HP MP9 G2 manual

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  • Brand: HP
  • Product: Cash register
  • Model/name: MP9 G2
  • Filetype: PDF
  • Available languages: English

Table of Contents

Page: 1
© Copyright 2015 HP Development Company,
L.P.
AMD is a trademark of Advanced Micro Devices,
Inc. Bluetooth is a trademark owned by its
proprietor and used by HP Inc. under license.
Intel, Celeron, and Pentium are trademarks of
Intel Corporation in the U.S. and other
countries. Microsoft and Windows are
trademarks of the Microsoft group of
companies.
The information contained herein is subject to
change without notice. The only warranties for
HP products and services are set forth in the
express warranty statements accompanying
such products and services. Nothing herein
should be construed as constituting an
additional warranty. HP shall not be liable for
technical or editorial errors or omissions
contained herein.
First Edition (October 2015)
Document Part Number: 822871-001
Product notice
This user guide describes features that are
common to most models. Some features may
not be available on your computer.
Not all features are available in all editions of
Windows. This computer may require upgraded
and/or separately purchased hardware, drivers
and/or software to take full advantage of
Windows functionality. Go to
http://www.microsoft.com for details.
Software terms
By installing, copying, downloading, or
otherwise using any software product
preinstalled on this computer, you agree to be
bound by the terms of the HP End User License
Agreement (EULA). If you do not accept these
license terms, your sole remedy is to return the
entire unused product (hardware and software)
within 14 days for a full refund subject to the
refund policy of your seller.
For any further information or to request a full
refund of the price of the computer, please
contact your seller.
Page: 2
Safety warning notice
WARNING! To reduce the possibility of heat-related injuries or of overheating the device, do not place
the device directly on your lap or obstruct the device air vents. Use the device only on a hard, flat surface. Do
not allow another hard surface, such as an adjoining optional printer, or a soft surface, such as pillows or rugs
or clothing, to block airflow. Also, do not allow the AC adapter to contact the skin or a soft surface, such as
pillows or rugs or clothing, during operation. The device and the AC adapter comply with the user-accessible
surface temperature limits defined by the International Standard for Safety of Information Technology
Equipment (IEC 60950).
iii
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iv Safety warning notice
Page: 4
Table of contents
1 Product features ........................................................................................................................................... 1
Standard configuration features ........................................................................................................................... 1
Front panel components (EliteDesk 800, ProDesk 600, and HP MP9) ................................................................. 1
Front panel components (EliteDesk 705 and ProDesk 400) ................................................................................. 2
Rear panel components (EliteDesk 800, EliteDesk 705, ProDesk 600, and HP MP9) .......................................... 3
Rear panel components (ProDesk 400) ................................................................................................................. 4
Serial number location .......................................................................................................................................... 5
2 Illustrated parts catalog ................................................................................................................................ 6
Desktop Mini (DM) chassis spare parts .................................................................................................................. 6
Computer major components ............................................................................................................. 6
Cables .................................................................................................................................................. 8
Misc parts ............................................................................................................................................. 9
Drives ................................................................................................................................................. 11
3 Routine care, SATA drive guidelines, and disassembly preparation .................................................................. 12
Electrostatic discharge information .................................................................................................................... 12
Generating static ............................................................................................................................... 12
Preventing electrostatic damage to equipment ............................................................................... 13
Personal grounding methods and equipment .................................................................................. 13
Grounding the work area ................................................................................................................... 13
Recommended materials and equipment ........................................................................................ 14
Operating guidelines ........................................................................................................................................... 14
Routine care ......................................................................................................................................................... 15
General cleaning safety precautions ................................................................................................ 15
Cleaning the Computer Case ............................................................................................................. 15
Cleaning the keyboard ....................................................................................................................... 15
Cleaning the monitor ......................................................................................................................... 16
Cleaning the mouse ........................................................................................................................... 16
Service considerations ......................................................................................................................................... 16
Tools and software Requirements .................................................................................................... 16
Screws ............................................................................................................................................... 16
Cables and connectors ...................................................................................................................... 17
Hard Drives ........................................................................................................................................ 17
Lithium coin cell battery .................................................................................................................... 17
SATA hard drives .................................................................................................................................................. 17
v
Page: 5
SATA hard drive cables ......................................................................................................................................... 18
SATA data cable ................................................................................................................................. 18
SMART ATA drives ................................................................................................................................................ 18
Cable management .............................................................................................................................................. 19
4 Removal and replacement procedures – desktop mini (DM) chassis .................................................................. 20
Preparation for disassembly ............................................................................................................................... 20
Top cover .............................................................................................................................................................. 21
Front bezel ........................................................................................................................................................... 22
Hard drive ............................................................................................................................................................. 23
Secondary fan (EliteDesk 800 and MP9 models only) ........................................................................................ 26
Drive cage ............................................................................................................................................................ 27
M.2 PCIe solid state drive (SSD) ........................................................................................................................... 28
WLAN module ...................................................................................................................................................... 30
External antenna ................................................................................................................................................. 32
RTC battery .......................................................................................................................................................... 34
Thermal sensor .................................................................................................................................................... 36
Fan ........................................................................................................................................................................ 37
Power switch/light cover ..................................................................................................................................... 38
Memory ................................................................................................................................................................ 39
SODIMMs ............................................................................................................................................ 39
SODIMM specifications ...................................................................................................................... 39
Populating SODIMM sockets ............................................................................................................. 40
Replacing SODIMMs ........................................................................................................................... 41
Heat sink .............................................................................................................................................................. 43
Processor – Intel models ..................................................................................................................................... 45
Speaker ................................................................................................................................................................ 47
Expansion connector board ................................................................................................................................. 48
System board ....................................................................................................................................................... 49
System board callouts, EliteDesk 800, ProDesk 600, and HP MP9 Retail System ........................... 51
System board callouts, EliteDesk 705 .............................................................................................. 52
System board callouts, ProDesk 400 ................................................................................................ 53
Internal WLAN antenna cable removal/installation ............................................................................................ 54
Changing from desktop to tower configuration .................................................................................................. 57
5 Computer Setup (F10) Utility ........................................................................................................................ 58
Computer Setup (F10) Utilities ............................................................................................................................ 58
Using Computer Setup (F10) Utilities ................................................................................................ 58
Computer Setup–Main ....................................................................................................................... 60
Computer Setup—Security ............................................................................................................... 62
Computer Setup—Advanced ............................................................................................................. 64
vi
Page: 6
Recovering the Configuration Settings ............................................................................................................... 69
6 Troubleshooting without diagnostics ............................................................................................................ 70
Safety and comfort .............................................................................................................................................. 70
Before you call for technical support .................................................................................................................. 70
Helpful hints ........................................................................................................................................................ 71
Solving general problems .................................................................................................................................... 72
Solving power problems ...................................................................................................................................... 76
Solving hard drive problems ................................................................................................................................ 77
Solving media card reader problems ................................................................................................................... 79
Solving display problems .................................................................................................................................... 80
Solving audio problems ....................................................................................................................................... 85
Solving printer problems ..................................................................................................................................... 87
Solving keyboard and mouse problems .............................................................................................................. 88
Solving Hardware Installation Problems ............................................................................................................. 90
Solving Network Problems .................................................................................................................................. 91
Solving memory problems .................................................................................................................................. 94
Solving CD-ROM and DVD problems .................................................................................................................... 95
Solving USB flash drive problems ........................................................................................................................ 98
Solving front panel component problems .......................................................................................................... 99
Solving Internet access problems ....................................................................................................................... 99
Solving software problems ............................................................................................................................... 101
7 POST error messages and diagnostic front panel LEDs and audible codes ....................................................... 102
POST numeric codes and text messages .......................................................................................................... 102
Interpreting system validation diagnostic front panel LEDs and audible codes .............................................. 107
8 Password security and resetting CMOS ........................................................................................................ 109
Resetting the password jumper ........................................................................................................................ 109
Clearing and resetting the BIOS ........................................................................................................................ 111
9 Using HP PC Hardware Diagnostics (UEFI) ..................................................................................................... 113
Downloading HP PC Hardware Diagnostics (UEFI) to a USB device .................................................................. 113
10 System backup and recovery ..................................................................................................................... 115
Backing up, restoring, and recovering in Windows 10 ...................................................................................... 115
Creating recovery media and backups ............................................................................................ 115
Creating HP Recovery media (select products only) .................................................... 115
Using Windows tools ....................................................................................................................... 117
Restore and recovery ...................................................................................................................... 117
vii
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Recovering using HP Recovery Manager ...................................................................... 117
What you need to know before you get started ........................................ 117
Using the HP Recovery partition (select products only) ............................ 118
Using HP Recovery media to recover ......................................................... 118
Changing the computer boot order ............................................................ 119
Removing the HP Recovery partition (select products only) ..................... 119
Backing up, restoring, and recovering in Windows 8.1 or Windows 8 .............................................................. 119
Creating recovery media and backups ............................................................................................ 119
Restoring and recovering using Windows tools ............................................................................. 120
Using Reset when the system is not responding ......................................................... 120
Recovery using the Windows recovery USB flash drive ............................................... 121
Recovery using Windows operating system media (purchased separately) ............... 121
Backing up, restoring, and recovering in Windows 7 ........................................................................................ 121
Creating recovery media ................................................................................................................. 122
Creating recovery media using HP Recovery Manager (select models only) ............... 122
Creating recovery discs with HP Recovery Disc Creator (select models only) ............. 123
Creating recovery discs .............................................................................. 124
Backing up your information ........................................................................................ 124
System Restore ............................................................................................................................... 125
System Recovery ............................................................................................................................. 125
System Recovery when Windows is responding .......................................................... 125
System Recovery when Windows is not responding .................................................... 126
System Recovery using recovery media (select models only) ..................................... 126
Using HP Recovery Disc operating system discs (select models only) ........................ 127
Appendix A Power Cord Set Requirements ...................................................................................................... 129
General Requirements ....................................................................................................................................... 129
Japanese Power Cord Requirements ................................................................................................................. 129
Country-Specific Requirements ........................................................................................................................ 130
Appendix B Statement of Volatility ................................................................................................................ 131
Appendix C Specifications ............................................................................................................................. 132
Index ........................................................................................................................................................... 133
viii
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1 Product features
Standard configuration features
Features may vary depending on the model. For a complete listing of the hardware and software installed in
the computer, run the diagnostic utility (included on some computer models only).
NOTE: This computer model can be used in a tower orientation or a desktop orientation. The tower stand is
sold separately.
CAUTION: Several well-known vulnerabilities exist when a computer is in the Sleep state. To prevent an
unauthorized user from accessing data on your computer, even encrypted data, HP recommends that you
always initiate Hibernation instead of Sleep anytime the computer will be out of your physical
possession. This practice is particularly important when you travel with your computer.
Front panel components (EliteDesk 800, ProDesk 600, and HP
MP9)
NOTE: Your computer model may look slightly different from the illustration in this section.
1 Headphone Connector 5 USB 3.0 Port
2 Microphone or Headphone Connector (software
selectable, default mode is microphone)
6 HDD Activity LED
3 USB 3.0 Type C Port 7 Dual-State Power Button
4 USB 3.0 Port–Charging
NOTE: The USB 3.0 Port–Charging also provides current to charge a device such as a Smart Phone. The charging current is available
whenever the AC power cord is connected to the system, even when the system is off.
NOTE: The Power On Light is normally white when the power is on. If it is flashing red, there is a problem with the computer and it is
displaying a diagnostic code. Refer to the Interpreting system validation diagnostic front panel LEDs and audible codes on page 107 to
interpret the code.
Standard configuration features 1
Page: 9
Front panel components (EliteDesk 705 and ProDesk 400)
NOTE: Your computer model may look slightly different from the illustration in this section.
1 Headphone Connector 4 USB 3.0 Port
2 Microphone Connector 5 HDD Activity LED
3 USB 3.0 Port-Charging
NOTE: This USB 3.0 connector does not offer
port charging on 400 models.
6 Dual-State Power Button
NOTE: The USB 3.0 Port–Charging also provides current to charge a device such as a Smart Phone. The charging current is available
whenever the AC power cord is connected to the system, even when the system is off.
NOTE: The Power On Light is normally white when the power is on. If it is flashing red, there is a problem with the computer and it is
displaying a diagnostic code. Refer to the Interpreting system validation diagnostic front panel LEDs and audible codes on page 107 to
interpret the code.
2 Chapter 1 Product features
Page: 10
Rear panel components (EliteDesk 800, EliteDesk 705, ProDesk
600, and HP MP9)
NOTE: Your computer model may look slightly different from the illustration in this section.
1 External Antenna Connector (optional) 8 VGA Monitor Connector
2 Thumbscrew 9 DisplayPort (default, shown), HDMI, or Serial
Connector
3 Padlock Loop 10 USB 3.0 Ports (2) (blue)
4 Cable Lock Slot 11 USB 3.0 Ports (2) (blue) with support for wake
from S4/S5 power states (not for 705 models)
NOTE: On 705 models this is a USB 2.0 port
that supports only the S4 power state.
5 External Antenna Connector (optional) 12 RJ-45 Network Connector
6 Wireless antenna 13 Power Connector
7 DisplayPort Monitor Connector
Rear panel components (EliteDesk 800, EliteDesk 705, ProDesk 600, and HP MP9) 3
Page: 11
Rear panel components (ProDesk 400)
NOTE: Your computer model may look slightly different from the illustration in this section.
1 External Antenna Connector (optional) 8 VGA Monitor Connector
2 Thumbscrew 9 Serial Port
3 Padlock Loop 10 USB 3.0 Ports (2) (blue) with support for wake
from S4/S5 power states
4 Cable Lock Slot 11 USB 2.0 Connectors (2) (black)
5 External Antenna Connector (optional) 12 RJ-45 Network Connector
6 Wireless antenna 13 Power Connector
7 DisplayPort Monitor Connector
4 Chapter 1 Product features
Page: 12
Serial number location
Each computer has a unique serial number and a product ID number that are located on the exterior of the
computer. Keep these numbers available for use when contacting customer service for assistance.
Serial number location 5
Page: 13
2 Illustrated parts catalog
Desktop Mini (DM) chassis spare parts
NOTE: HP continually improves and changes product parts. For complete and current information on
supported parts for your computer, go to http://partsurfer.hp.com, select your country or region, and then
follow the on-screen instructions.
Computer major components
Item Description
(1) Top cover
(2) Front bezel (ProDesk model shown)
(3) External power supply, 90W
90 W
65 W
(4) System board (includes replacement thermal material)
6 Chapter 2 Illustrated parts catalog
Page: 14
Item Description
(5) Memory modules (DDR3, PC3-12800, 1600-MHz)(for use in EliteDesk 705 models)
8-GB
4-GB
* Memory modules (DDR4, PC4-17000, 2133-MHz)(for use in EliteDesk 800, ProDesk 600, ProDesk 400, and MP9 models)
16-GB
8-GB
4-GB
* Intel Processors (800, 600, 400, MP9 models; include replacement thermal material)
Intel Core i7-6700
Intel Core i7-6700T
Intel Core i5-6600
Intel Core i5-6600T
Intel Core i5-6500
Intel Core i7-6500T
Intel Core i3-6320
Intel Core i3-6300T
Intel Core i3-6100T
Intel Pentium G4500T
Intel Pentium G4400T
Intel Pentium G4400TE (MP9 G2 models only)
Intel Celeron G3900T
Intel Celeron G3900TE (MP9 G2 models only)
* AMD Processors (705 models; not replaceable)
AMD PRO A12 APU with AMD Radeon™ R7 HD Graphics
AMD PRO A10 APU with AMD Radeon R7 HD Graphics
AMD PRO A8 APU with AMD Radeon R6 HD Graphics
AMD PRO A6 APU with AMD Radeon R5 HD Graphics
Desktop Mini (DM) chassis spare parts 7
Page: 15
Cables
Item Description
(1) SATA cable/connector
NOTE: Included with computer.
Tab color may vary.
* Adapter, DisplayPort to HDMI 1.4
* Adapter, DisplayPort to VGA
* Adapter, DisplayPort to DVI
* Adapter, USB-C to USB 3.0 (800, 600, MP9 models)
* DisplayPort cable
* USB to serial adapter
8 Chapter 2 Illustrated parts catalog
Page: 16
Misc parts
Item Description
(1) Heat sink
(2) Fan
(3) Secondary hard drive fan (for use in EliteDesk 800 and MP9, 65W models)
(4) Speaker
(5) Power switch/light cover
(6) Option board, HDMI
(7) Option board, serial port
* Option board, DisplayPort (not illstrated)
(8) Thermal sensor
(9) Hood sensor assembly
* Stand
* Port cover
* HP Ultraslim Keyed Cable Lock
Desktop Mini (DM) chassis spare parts 9
Page: 17
Item Description
* WLAN modules:
Intel Dual Band Wireless-AC 7265 NV
Intel Dual Band Wireless-AC 8260 + Bluetooth 4.0
Intel Dual Band Wireless-AC 3165 + Bluetooth 4.0
HP WLAN 802.11 a/b/g/n + Bluetooth 4.0
* Antenna, dual band dipole, 802.11a/b/g/n + Velcro
* External antenna kit
* Expansion Module Kit
Hard drive – I/O (includes screws)
I/O
Optical drive
USB 3.0 Type A-B
USB 3.0 Type A-B (short)
* Security/Dual VESA Sleeve
* Screw Kit
* Mouse
USB, laser
USB, optical
Washable
Wireless
Antimicrobial
Hardened
* Keyboards
USB slim
USB
Wireless
Washable
Smart card
Conferencing
Antimicrobial
10 Chapter 2 Illustrated parts catalog
Page: 18
Drives
Description
Hard drives
2 TB, 5400 rpm, hard drive, 2.5-inch
1 TB, 7200 rpm, hard drive, 2.5-inch
1 TB, 7200 rpm, hard drive, 2.5-inch, SSHD (hybrid SSD)
500 GB, 7200 rpm hard drive, 2.5-inch
500 GB, 2.5-inch, SSHD (hybrid SSD)
500 GB, 7200 rpm hard drive, 2.5-inch, OPAL 2, SED
500 GB, 5400 rpm hard drive, 2.5-inch, FIPS
Solid-state drives
512 GB solid-state drive (SSD), 3D, NAND
256 GB solid-state drive (SSD), OPAL 2, self-encrypting (SED)
256 GB solid-state drive (SSD)
256 GB solid-state drive (SSD), 3D, NAND
180 GB solid-state drive (SSD), SATA 6.0, MLC
180 GB solid-state drive (SSD)
128 GB solid-state drive (SSD)
128 GB solid-state drive (SSD), OPAL 2, Self-encrypting Drive (SED), SATA 6.0
128 GB solid-state drive (SSD), 3D, NAND
120 GB solid-state drive (SSD), SATA 6.0, MLC
120 GB solid-state drive (SSD)
M.2 drive
256 GB solid-state drive (SSD), PCIe, 2280, NVMe
256 GB solid-state drive (SSD), PCIe, 2280SS
128 GB solid-state drive (SSD), PCIe, 2280, NVMe
128 GB solid-state drive (SSD), PCIe, 2280SS
External optical drive
8x DVD drive
Desktop Mini (DM) chassis spare parts 11
Page: 19
3 Routine care, SATA drive guidelines, and
disassembly preparation
This chapter provides general service information for the computer. Adherence to the procedures and
precautions described in this chapter is essential for proper service.
CAUTION: When the computer is plugged into an AC power source, voltage is always applied to the system
board. You must disconnect the power cord from the power source before opening the computer to prevent
system board or component damage.
Electrostatic discharge information
A sudden discharge of static electricity from your finger or other conductor can destroy static-sensitive
devices or microcircuitry. Often the spark is neither felt nor heard, but damage occurs. An electronic device
exposed to electrostatic discharge (ESD) may not appear to be affected at all and can work perfectly
throughout a normal cycle. The device may function normally for a while, but it has been degraded in the
internal layers, reducing its life expectancy.
Networks built into many integrated circuits provide some protection, but in many cases, the discharge
contains enough power to alter device parameters or melt silicon junctions.
Generating static
The following table shows that:
● Different activities generate different amounts of static electricity.
● Static electricity increases as humidity decreases.
Relative Humidity
Event 55% 40% 10%
Walking across carpet
Walking across vinyl floor
Motions of bench worker
Removing DIPs from plastic tube
7,500 V
3,000 V
400 V
400 V
15,000 V
5,000 V
800 V
700 V
35,000 V
12,000 V
6,000 V
2,000 V
Removing DIPs from vinyl tray
Removing DIPs from Styrofoam
Removing bubble pack from PCB
Packing PCBs in foam-lined box
2,000 V
3,500 V
7,000 V
5,000 V
4,000 V
5,000 V
20,000 V
11,000 V
11,500 V
14,500 V
26,500 V
21,000 V
These are then multi-packaged inside plastic tubes, trays, or Styrofoam.
NOTE: 700 volts can degrade a product.
12 Chapter 3 Routine care, SATA drive guidelines, and disassembly preparation
Page: 20
Preventing electrostatic damage to equipment
Many electronic components are sensitive to ESD. Circuitry design and structure determine the degree of
sensitivity. The following packaging and grounding precautions are necessary to prevent damage to electric
components and accessories.
● To avoid hand contact, transport products in static-safe containers such as tubes, bags, or boxes.
● Protect all electrostatic parts and assemblies with conductive or approved containers or packaging.
● Keep electrostatic sensitive parts in their containers until they arrive at static-free stations.
● Place items on a grounded surface before removing them from their container.
● Always be properly grounded when touching a sensitive component or assembly.
● Avoid contact with pins, leads, or circuitry.
● Place reusable electrostatic-sensitive parts from assemblies in protective packaging or conductive
foam.
Personal grounding methods and equipment
Use the following equipment to prevent static electricity damage to equipment:
● Wrist straps are flexible straps with a maximum of one-megohm ± 10% resistance in the ground cords.
To provide proper ground, a strap must be worn snug against bare skin. The ground cord must be
connected and fit snugly into the banana plug connector on the grounding mat or workstation.
● Heel straps/Toe straps/Boot straps can be used at standing workstations and are compatible with
most types of shoes or boots. On conductive floors or dissipative floor mats, use them on both feet with
a maximum of one-megohm ± 10% resistance between the operator and ground.
Static Shielding Protection Levels
Method Voltage
Antistatic plastic
Carbon-loaded plastic
Metallized laminate
1,500
7,500
15,000
Grounding the work area
To prevent static damage at the work area, use the following precautions:
● Cover the work surface with approved static-dissipative material. Provide a wrist strap connected to the
work surface and properly grounded tools and equipment.
● Use static-dissipative mats, foot straps, or air ionizers to give added protection.
● Handle electrostatic sensitive components, parts, and assemblies by the case or PCB laminate. Handle
them only at static-free work areas.
● Turn off power and input signals before inserting and removing connectors or test equipment.
● Use fixtures made of static-safe materials when fixtures must directly contact dissipative surfaces.
● Keep work area free of nonconductive materials such as ordinary plastic assembly aids and Styrofoam.
● Use field service tools, such as cutters, screwdrivers, and vacuums, that are conductive.
Electrostatic discharge information 13
Page: 21
Recommended materials and equipment
Materials and equipment that are recommended for use in preventing static electricity include:
● Antistatic tape
● Antistatic smocks, aprons, or sleeve protectors
● Conductive bins and other assembly or soldering aids
● Conductive foam
● Conductive tabletop workstations with ground cord of one-megohm +/- 10% resistance
● Static-dissipative table or floor mats with hard tie to ground
● Field service kits
● Static awareness labels
● Wrist straps and footwear straps providing one-megohm +/- 10% resistance
● Material handling packages
● Conductive plastic bags
● Conductive plastic tubes
● Conductive tote boxes
● Opaque shielding bags
● Transparent metallized shielding bags
● Transparent shielding tubes
Operating guidelines
To prevent overheating and to help prolong the life of the computer:
● Keep the computer away from excessive moisture, direct sunlight, and extremes of heat and cold.
● Operate the computer on a sturdy, level surface. Leave a 10.2-cm (4-inch) clearance on all vented sides
of the computer and above the monitor to permit the required airflow.
● Never restrict the airflow into the computer by blocking any vents or air intakes. Do not place the
keyboard, with the keyboard feet down, directly against the front of the desktop unit as this also
restricts airflow.
● Occasionally clean the air vents on all vented sides of the computer. Lint, dust, and other foreign matter
can block the vents and limit the airflow. Be sure to unplug the computer before cleaning the air vents.
● Never operate the computer with the cover or side panel removed.
● Do not stack computers on top of each other or place computers so near each other that they are subject
to each other’s re-circulated or preheated air.
● If the computer is to be operated within a separate enclosure, intake and exhaust ventilation must be
provided on the enclosure, and the same operating guidelines listed above will still apply.
● Keep liquids away from the computer and keyboard.
14 Chapter 3 Routine care, SATA drive guidelines, and disassembly preparation
Page: 22
● Never cover the ventilation slots on the monitor with any type of material.
● Install or enable power management functions of the operating system or other software, including
sleep states.
Routine care
General cleaning safety precautions
1. Never use solvents or flammable solutions to clean the computer.
2. Never immerse any parts in water or cleaning solutions; apply any liquids to a clean cloth and then use
the cloth on the component.
3. Always unplug the computer when cleaning with liquids or damp cloths.
4. Always unplug the computer before cleaning the keyboard, mouse, or air vents.
5. Disconnect the keyboard before cleaning it.
6. Wear safety glasses equipped with side shields when cleaning the keyboard.
Cleaning the Computer Case
Follow all safety precautions in General cleaning safety precautions on page 15 before cleaning the computer.
To clean the computer case, follow the procedures described below:
● To remove light stains or dirt, use plain water with a clean, lint-free cloth or swab.
● For stronger stains, use a mild dishwashing liquid diluted with water. Rinse well by wiping it with a cloth
or swab dampened with clear water.
● For stubborn stains, use isopropyl (rubbing) alcohol. No rinsing is needed as the alcohol will evaporate
quickly and not leave a residue.
● After cleaning, always wipe the unit with a clean, lint-free cloth.
● Occasionally clean the air vents on the computer. Lint and other foreign matter can block the vents and
limit the airflow.
Cleaning the keyboard
Follow all safety precautions in General cleaning safety precautions on page 15 before cleaning the keyboard.
To clean the tops of the keys or the keyboard body, follow the procedures described in Cleaning the Computer
Case on page 15.
When cleaning debris from under the keys, review all rules in General cleaning safety precautions on page 15
before following these procedures:
CAUTION: Use safety glasses equipped with side shields before attempting to clean debris from under the
keys.
● Visible debris underneath or between the keys may be removed by vacuuming or shaking.
● Canned, pressurized air may be used to clean debris from under the keys. Caution should be used as too
much air pressure can dislodge lubricants applied under the wide keys.
Routine care 15
Page: 23
● If you remove a key, use a specially designed key puller to prevent damage to the keys. This tool is
available through many electronic supply outlets.
CAUTION: Never remove a wide leveled key (like the space bar) from the keyboard. If these keys are
improperly removed or installed, the keyboard may not function properly.
● Cleaning under a key may be done with a swab moistened with isopropyl alcohol and squeezed out. Be
careful not to wipe away lubricants necessary for proper key functions. Use tweezers to remove any
fibers or dirt in confined areas. Allow the parts to air dry before reassembly.
Cleaning the monitor
● Wipe the monitor screen with a clean cloth moistened with water or with a towelette designed for
cleaning monitors. Do not use sprays or aerosols directly on the screen; the liquid may seep into the
housing and damage a component. Never use solvents or flammable liquids on the monitor.
● To clean the monitor body follow the procedures in Cleaning the Computer Case on page 15.
Cleaning the mouse
Before cleaning the mouse, ensure that the power to the computer is turned off.
● Clean the mouse ball by first removing the retaining plate and the ball from the housing. Pull out any
debris from the ball socket and wipe the ball with a clean, dry cloth before reassembly.
● To clean the mouse body, follow the procedures in Cleaning the Computer Case on page 15.
Service considerations
Listed below are some of the considerations that you should keep in mind during the disassembly and
assembly of the computer.
Tools and software Requirements
To service the computer, you need the following:
● Torx T-15 screwdriver
● Torx T-15 screwdriver with small diameter shank (for certain front bezel removal)
● Flat-bladed screwdriver (may sometimes be used in place of the Torx screwdriver)
● Phillips #2 screwdriver
● Diagnostics software
● Tamper-resistant T-15 wrench
Screws
The screws used in the computer are not interchangeable. They may have standard or metric threads and may
be of different lengths. If an incorrect screw is used during the reassembly process, it can damage the unit. HP
strongly recommends that all screws removed during disassembly be kept with the part that was removed,
then returned to their proper locations.
CAUTION: Metric screws have a black finish. U.S. screws have a silver finish and are used on hard drives only.
CAUTION: As each subassembly is removed from the computer, it should be placed away from the work area
to prevent damage.
16 Chapter 3 Routine care, SATA drive guidelines, and disassembly preparation
Page: 24
Cables and connectors
Most cables used throughout the unit are flat, flexible cables. These cables must be handled with care to
avoid damage. Apply only the tension required to seat or unseat the cables during insertion or removal from
the connector. Handle cables by the connector whenever possible. In all cases, avoid bending or twisting the
cables, and ensure that the cables are routed in such a way that they cannot be caught or snagged by parts
being removed or replaced.
CAUTION: When servicing this computer, ensure that cables are placed in their proper location during the
reassembly process. Improper cable placement can damage the computer.
Hard Drives
Handle hard drives as delicate, precision components, avoiding all physical shock and vibration. This applies
to failed drives as well as replacement spares.
● If a drive must be mailed, place the drive in a bubble-pack mailer or other suitable protective packaging
and label the package “Fragile: Handle With Care.”
● Do not remove hard drives from the shipping package for storage. Keep hard drives in their protective
packaging until they are actually mounted in the computer.
● Avoid dropping drives from any height onto any surface.
● If you are inserting or removing a hard drive, turn off the computer. Do not remove a hard drive while the
computer is on or in standby mode.
● Before handling a drive, ensure that you are discharged of static electricity. While handling a drive, avoid
touching the connector.
● Do not use excessive force when inserting a drive.
● Avoid exposing a hard drive to liquids, temperature extremes, or products that have magnetic fields
such as monitors or speakers.
Lithium coin cell battery
The battery that comes with the computer provides power to the real-time clock and has a minimum lifetime
of about three years.
See the appropriate removal and replacement chapter for the chassis you are working on in this guide for
instructions on the replacement procedures.
WARNING! This computer contains a lithium battery. There is a risk of fire and chemical burn if the battery is
handled improperly. Do not disassemble, crush, puncture, short external contacts, dispose in water or fire, or
expose it to temperatures higher than 140ºF (60ºC). Do not attempt to recharge the battery.
NOTE: Batteries, battery packs, and accumulators should not be disposed of together with the general
household waste. In order to forward them to recycling or proper disposal, please use the public collection
system or return them to HP, their authorized partners, or their agents.
SATA hard drives
Serial ATA Hard Drive Characteristics
Number of pins/conductors in data cable 7/7
Number of pins in power cable 15
SATA hard drives 17
Page: 25
Maximum data cable length 39.37 in (100 cm)
Data interface voltage differential 400-700 mV
Drive voltages 3.3 V, 5 V, 12 V
Jumpers for configuring drive N/A
Data transfer rate 6.0 Gb/s
SATA hard drive cables
SATA data cable
Always use an HP approved SATA 6.0 Gb/s cable as it is fully backwards compatible with the SATA 1.5 Gb/s
drives.
Current HP desktop products ship with SATA 6.0 Gb/s hard drives.
SATA data cables are susceptible to damage if overflexed. Never crease a SATA data cable and never bend it
tighter than a 30 mm (1.18 in) radius.
The SATA data cable is a thin, 7-pin cable designed to transmit data for only a single drive.
SMART ATA drives
The Self Monitoring Analysis and Recording Technology (SMART) ATA drives for the HP Personal Computers
have built-in drive failure prediction that warns the user or network administrator of an impending failure or
crash of the hard drive. The SMART drive tracks fault prediction and failure indication parameters such as
reallocated sector count, spin retry count, and calibration retry count. If the drive determines that a failure is
imminent, it generates a fault alert.
18 Chapter 3 Routine care, SATA drive guidelines, and disassembly preparation
Page: 26
Cable management
Always follow good cable management practices when working inside the computer.
● Keep cables away from major heat sources like the heat sink.
● Do not jam cables on top of expansion cards or memory modules. Printed circuit cards like these are not
designed to take excessive pressure on them.
● Keep cables clear of sliding or moveable parts to prevent them from being cut or crimped when the parts
are moved.
● When folding a flat ribbon cable, never fold to a sharp crease. Sharp creases may damage the wires.
● Some flat ribbon cables come prefolded. Never change the folds on these cables.
● Do not bend any cable sharply. A sharp bend can break the internal wires.
● Never bend a SATA data cable tighter than a 30 mm (1.18 in) radius.
● Never crease a SATA data cable.
● Do not rely on components like the drive cage, power supply, or computer cover to push cables down
into the chassis. Always position the cables to lay properly by themselves.
Cable management 19
Page: 27
4 Removal and replacement procedures –
desktop mini (DM) chassis
Adherence to the procedures and precautions described in this chapter is essential for proper service. After
completing all necessary removal and replacement procedures, run the Diagnostics utility to verify that all
components operate properly.
NOTE: Not all features listed in this guide are available on all computers.
NOTE: HP continually improves and changes product parts. For complete and current information on
supported parts for your computer, go to http://partsurfer.hp.com, select your country or region, and then
follow the on-screen instructions.
Preparation for disassembly
See Routine care, SATA drive guidelines, and disassembly preparation on page 12 for initial safety procedures.
1. Remove/disengage any security devices that prohibit opening the computer.
2. Remove all removable media, such as a USB flash drive, from the computer.
3. Turn off the computer properly through the operating system, then turn off any external devices.
CAUTION: Turn off the computer before disconnecting any cables.
Regardless of the power-on state, voltage is always present on the system board as long as the system
is plugged into an active AC outlet. In some systems the cooling fan is on even when the computer is in
the “Standby,” or “Suspend” modes. The power cord should always be disconnected before servicing a
unit.
4. Disconnect the power cord from the power outlet and disconnect any external devices.
5. If the computer is on a stand, remove the computer from the stand.
WARNING! Beware of sharp edges inside the chassis.
20 Chapter 4 Removal and replacement procedures – desktop mini (DM) chassis
Page: 28
Top cover
1. Prepare the computer for disassembly (Preparation for disassembly on page 20).
2. Loosen the thumbscrew on the rear of the computer (1).
3. Slide the panel forward and lift if off the computer (2).
NOTE: Your computer model may look slightly different from the illustration in this section.
To install the top cover, reverse the removal procedure.
Top cover 21
Page: 29
Front bezel
The front bezel is secured to the top cover by tabs.
1. Prepare the computer for disassembly (Preparation for disassembly on page 20).
2. Remove the top cover (Top cover on page 21).
3. Position the top cover upside-down so you can access the inside of the bezel.
4. Pull down to loose the bottom, interior on the bezel (1).
5. Disengage the tabs on the top, interior of the bezel (2).
6. Remove the bezel from the top cover.
To install the front bezel, reverse the removal procedure.
22 Chapter 4 Removal and replacement procedures – desktop mini (DM) chassis
Page: 30
Hard drive
Description
Hard drives
2 TB, 5400 rpm, hard drive, 2.5-inch
1 TB, 7200 rpm, hard drive, 2.5-inch
1 TB, 7200 rpm, hard drive, 2.5-inch, SSHD (hybrid SSD)
500 GB, 7200 rpm hard drive, 2.5-inch
500 GB, 2.5-inch, SSHD (hybrid SSD)
500 GB, 7200 rpm hard drive, 2.5-inch, OPAL 2, SED
500 GB, 5400 rpm hard drive, 2.5-inch, FIPS
Solid-state drives
512 GB solid-state drive (SSD), 3D, NAND
256 GB solid-state drive (SSD), OPAL 2, self-encrypting (SED)
256 GB solid-state drive (SSD)
256 GB solid-state drive (SSD), 3D, NAND
180 GB solid-state drive (SSD), SATA 6.0, MLC
180 GB solid-state drive (SSD)
128 GB solid-state drive (SSD)
128 GB solid-state drive (SSD), OPAL 2, Self-encrypting Drive (SED), SATA 6.0
128 GB solid-state drive (SSD), 3D, NAND
120 GB solid-state drive (SSD), SATA 6.0, MLC
120 GB solid-state drive (SSD)
NOTE: Before you remove the old hard drive, be sure to back up the data from the old hard drive so that you
can transfer the data to the new hard drive.
1. Prepare the computer for disassembly (Preparation for disassembly on page 20).
2. Remove the top cover Top cover on page 21.
3. Pull the blue tab (1) to disconnect the HDD power and data cable from the HDD.
Hard drive 23
Page: 31
4. Pull the release lever next to the rear of the HDD away from the HDD (2). While pulling the release lever
out, slide the drive back until it stops, then lift the HDD up and out of the cage (3).
5. To install a HDD, you must transfer the silver and blue isolation mounting guide screws from the old HDD
to the new HDD.
6. Align the guide screws with the slots on the chassis drive cage, press the HDD down into the cage, then
slide it forward until it stops and locks in place (1).
24 Chapter 4 Removal and replacement procedures – desktop mini (DM) chassis
Page: 32
7. Connect the HDD power and data cable (2) to the HDD.
Reverse this procedure to replace the hard drive.
Hard drive 25
Page: 33
Secondary fan (EliteDesk 800 and MP9 models only)
HP EliteDesk 800 G2 and HP MP9 G2 Retail System models include a secondary fan installed under the hard
drive.
1. Prepare the computer for disassembly (Preparation for disassembly on page 20).
2. Remove the top cover (Top cover on page 21).
3. Remove the hard drive (Hard drive on page 23).
4. Disconnect the fan plug from the system board (1).
5. Remove the two screws securing the secondary fan (2).
6. Lift the fan out of the chassis (3).
To install the secondary fan, reverse the removal procedure.
26 Chapter 4 Removal and replacement procedures – desktop mini (DM) chassis
Page: 34
Drive cage
The drive cage is located next to the heat sink. The drive cage is secured with three Phillips screws.
1. Prepare the computer for disassembly (Preparation for disassembly on page 20).
2. Remove the top cover (Top cover on page 21).
3. Remove the hard drive (Hard drive on page 23).
4. Remove the three screws securing the HDD cage to the chassis (1).
5. Pull the hood sensor up and off the HDD cage (2).
6. Lift the HDD cage out of the chassis (3).
To install the drive cage, reverse the removal procedure.
Drive cage 27
Page: 35
M.2 PCIe solid state drive (SSD)
Description
256 GB solid-state drive (SSD), PCIe, 2280, NVMe
256 GB solid-state drive (SSD), PCIe, 2280SS
128 GB solid-state drive (SSD), PCIe, 2280, NVMe
128 GB solid-state drive (SSD), PCIe, 2280SS
1. Prepare the computer for disassembly (Preparation for disassembly on page 20).
2. Remove the top cover Top cover on page 21.
3. Remove the hard drive (Hard drive on page 23).
4. If your model is an EliteDesk 800 or MP9, remove the secondary fan (Secondary fan (EliteDesk 800 and
MP9 models only) on page 26).
5. Remove the hard drive cage (Drive cage on page 27).
6. Locate the SSD on the system board.
7. Remove the screw securing the SSD to the system board.
8. Grasp the SSD by the sides and carefully pull it out of the socket.
9. Insert the new SSD into the socket on the system board.
NOTE: An SSD can be installed in only one way.
10. Press the SSD connectors firmly into the socket.
28 Chapter 4 Removal and replacement procedures – desktop mini (DM) chassis
Page: 36
11. Press the SSD down to the system board and use the included screw to secure the SSD.
M.2 PCIe solid state drive (SSD) 29
Page: 37
WLAN module
Description
Intel Dual Band Wireless-AC 7265 NV
Intel Dual Band Wireless-AC 8260 + Bluetooth 4.0
Intel Dual Band Wireless-AC 3165 + Bluetooth 4.0
HP WLAN 802.11 a/b/g/n + Bluetooth 4.0
The WLAN module is secured with one Phillips screw and has two connected antennas. It is located under the
hard drive.
1. Prepare the computer for disassembly (Preparation for disassembly on page 20).
2. Remove the top cover (Top cover on page 21).
3. Remove the hard drive (Hard drive on page 23).
4. If your model is an EliteDesk 800 or MP9, remove the secondary fan (Secondary fan (EliteDesk 800 and
MP9 models only) on page 26).
5. Remove the drive cage (Drive cage on page 27).
6. Locate the WLAN module on the system board.
7. Disconnect both antenna cables from the WLAN module.
NOTE: You may need to use a small tool, such as tweezers or needle-nose pliers, to disconnect and
connect the antenna cables.
8. Grasp the WLAN module by the sides and pull it out of the socket.
9. Insert the new WLAN module into the socket on the system board.
NOTE: A WLAN module can be installed in only one way.
10. Press the WLAN connectors firmly into the socket (1).
11. Press the WLAN module down to the system board and use the included screw to secure the module (2).
30 Chapter 4 Removal and replacement procedures – desktop mini (DM) chassis
Page: 38
12. Attach the internal antenna to the antenna connectors (3) on the WLAN module.
To install the WLAN module, reverse the removal procedure.
NOTE: WLAN modules are designed with a notch to prevent incorrect insertion.
WLAN module 31
Page: 39
External antenna
The antennas route from the WLAN module to the cable connectors on the rear of the computer.
To install the antennas:
1. Prepare the computer for disassembly (Preparation for disassembly on page 20).
2. Remove the top cover (Top cover on page 21).
3. Remove the hard drive (Hard drive on page 23).
4. If your model is an EliteDesk 800 or MP9, remove the secondary fan (Secondary fan (EliteDesk 800 and
MP9 models only) on page 26).
5. Remove the drive cage (Drive cage on page 27).
6. Locate the WLAN module on the system board.
7. Disconnect the internal antennae from the WLAN module.
For instructions, see WLAN module on page 30.
8. Locate both external antenna positions on the rear panel.
32 Chapter 4 Removal and replacement procedures – desktop mini (DM) chassis
Page: 40
9. Insert a Phillips screwdriver in each knock-out feature and rotate to remove the blank.
10. Feed the external antenna cable through each hole and screw the antenna into position.
11. Connect the external antenna cables to the WLAN module.
Reverse the removal procedure to install the WLAN antennas and transceivers.
External antenna 33
Page: 41
RTC battery
The battery that comes with the computer provides power to the real-time clock. When replacing the battery,
use a battery equivalent to the battery originally installed in the computer. The computer comes with a 3-volt
lithium coin cell battery.
WARNING! The computer contains an internal lithium manganese dioxide battery. There is a risk of fire and
burns if the battery is not handled properly. To reduce the risk of personal injury:
Do not attempt to recharge the battery.
Do not expose to temperatures higher than 60°C (140ºF).
Do not disassemble, crush, puncture, short external contacts, or dispose of in fire or water.
Replace the battery only with the HP spare designated for this product.
CAUTION: Before replacing the battery, it is important to back up the computer CMOS settings. When the
battery is removed or replaced, the CMOS settings will be cleared.
Static electricity can damage the electronic components of the computer or optional equipment. Before
beginning these procedures, ensure that you are discharged of static electricity by briefly touching a
grounded metal object.
NOTE: The lifetime of the lithium battery can be extended by plugging the computer into a live AC wall
socket. The lithium battery is only used when the computer is NOT connected to AC power.
HP encourages customers to recycle used electronic hardware, HP original print cartridges, and rechargeable
batteries. For more information about recycling programs, go to http://www.hp.com/recycle.
1. Prepare the computer for disassembly (Preparation for disassembly on page 20).
2. Remove the top cover (Top cover on page 21).
3. Remove the hard drive (Hard drive on page 23).
4. If your model is an EliteDesk 800 or MP9, remove the secondary fan (Secondary fan (EliteDesk 800 and
MP9 models only) on page 26).
5. Remove the hard drive cage (Drive cage on page 27).
34 Chapter 4 Removal and replacement procedures – desktop mini (DM) chassis
Page: 42
6. Locate the battery and battery holder on the system board.
NOTE: You may need to use a small tool, such as tweezers or needle-nose pliers, to remove and
replace the battery.
7. Lift the battery out of the holder.
8. Slide the replacement battery into position, positive side up. The battery holder automatically secures
the battery in the proper position.
RTC battery 35
Page: 43
Thermal sensor
A thermal sensor installs at the front of the computer near the speaker. Adhesive secures the sensor to the
chassis that houses the speaker.
To remove the thermal sensor:
1. Prepare the computer for disassembly (Preparation for disassembly on page 20).
2. Remove the top cover (Top cover on page 21).
3. Remove the hard drive (Hard drive on page 23).
4. If your model is an EliteDesk 800 or MP9, remove the secondary fan (Secondary fan (EliteDesk 800 and
MP9 models only) on page 26).
5. Remove the drive cage (Drive cage on page 27).
6. Disconnect the thermal module from the system board (1).
7. Pull to disengage the sensor to the computer chassis (2). The sensor is secured to the chassis with
adhesive.
To install the thermal sensor, reverse the removal procedures.
36 Chapter 4 Removal and replacement procedures – desktop mini (DM) chassis
Page: 44
Fan
The fan sits between the fan sink and the front of the computer.
1. Prepare the computer for disassembly (Preparation for disassembly on page 20).
2. Remove the top cover (Top cover on page 21).
3. Lift the tab on the outer edge of the fan and rotate the fan upward.
4. Disconnect the fan plug from the system board, and then lift the fan out of the chassis.
To install the fan, reverse the removal procedure.
Fan 37
Page: 45
Power switch/light cover
The power switch/light cover is located at the front, right of the computer, under the top cover.
1. Prepare the computer for disassembly (Preparation for disassembly on page 20).
2. Remove the top cover (Top cover on page 21).
3. Remove the fan (Fan on page 37).
4. Rotate the top of the cover away from the computer and lift it off the system board.
To install the power switch/light cover, reverse the removal procedure.
38 Chapter 4 Removal and replacement procedures – desktop mini (DM) chassis
Page: 46
Memory
Description
Memory modules (PC3-12800, 1600-MHz)(for use in EliteDesk 705 models)
8-GB
4-GB
Memory modules (PC4-17000, 2133-MHz)(for use in EliteDesk 800, ProDesk 600, ProDesk 400, and HP MP9 G2 Retail System models)
16-GB
8-GB
4-GB
The computer comes with small outline, dual inline memory modules (SODIMMs).
SODIMMs
The memory sockets on the system board can be populated with up to two industry-standard SODIMMs.
These memory sockets are populated with at least one preinstalled SODIMM. To achieve the maximum
memory support, you can populate the system board with up to 32 GB (EliteDesk 800, ProDesk 600, and HP
MP9) or 16 GB (EliteDesk 705 and ProDesk 400) of memory.
SODIMM specifications
For proper system operation, the SODIMMs must meet the following qualifications:
EliteDesk 800, ProDesk 600, HP
MP9
EliteDesk 705 ProDesk 400
SODIMM 1.2 volt DDR4-SDRAM DIMMs 1.5 volt DDR3-SDRAM DIMMs or 1.35
volt DDR3L-SDRAM (Low Power)
DIMMs
1.2 volt DDR4-SDRAM DIMMs
Compliance unbuffered non-ECC PC4-17000
DDR4-2133 MHz-compliant
unbuffered non-ECC PC3-12800
DDR3/DDR3L-1600 MHz-compliant
unbuffered non-ECC PC4-17000
DDR4-2133 MHz-compliant
Pins industry-standard 288-pin
containing the mandatory Joint
Electronic Device Engineering
Council (JEDEC) specification
industry-standard 240-pin
containing the mandatory Joint
Electronic Device Engineering
Council (JEDEC) specification
industry-standard 288-pin
containing the mandatory Joint
Electronic Device Engineering
Council (JEDEC) specification
Support support CAS latency 15 DDR4 2133
MHz (15-15-15 timing)
support CAS latency 11 DDR3/
DDR3L 1600 MHz (11-11-11 timing)
support CAS latency 15 DDR4 2133
MHz (15-15-15 timing)
Slots 2 2 2
Maximum
Memory
32 GB 16 GB 32 GB
Supported 512 Mbit, 1 Gbit, and 2 Gbit non-ECC memory technologies single-sided and double-sided DIMMs
Note The system will not operate properly if you install unsupported DIMM memory. DIMMs constructed with x8 and x16
DDR devices are supported; DIMMs constructed with x4 SDRAM are not supported.
Memory 39
Page: 47
HP offers upgrade memory for this computer and advises that the consumer purchase it to avoid
compatibility issues with unsupported third-party memory.
Populating SODIMM sockets
There are two SODIMM sockets on the system board, with one socket per channel. The sockets are labeled
DIMM1 and DIMM3. The DIMM1 socket operates in memory channel B. The DIMM3 socket operates in memory
channel A.
Item Description System Board Label Socket Color
1 SODIMM1 socket, Channel B DIMM1 Black
2 SODIMM3 socket, Channel A DIMM3 Black
The system will automatically operate in single channel mode, dual channel mode, or flex mode, depending
on how the SODIMMs are installed.
● The system will operate in single channel mode if the SODIMM sockets are populated in one channel
only.
● The system will operate in a higher-performing dual channel mode if the memory capacity of the
SODIMM in Channel A is equal to the memory capacity of the SODIMM in Channel B.
● The system will operate in flex mode if the memory capacity of the SODIMM in Channel A is not equal to
the memory capacity of the SODIMM in Channel B. In flex mode, the channel populated with the least
amount of memory describes the total amount of memory assigned to dual channel and the remainder
is assigned to single channel. If one channel will have more memory than the other, the larger amount
should be assigned to channel A.
● In any mode, the maximum operational speed is determined by the slowest SODIMM in the system.
40 Chapter 4 Removal and replacement procedures – desktop mini (DM) chassis
Page: 48
Replacing SODIMMs
CAUTION: You must disconnect the power cord and wait approximately 30 seconds for the power to drain
before adding or removing memory modules. Regardless of the power-on state, voltage is always supplied to
the memory modules as long as the computer is plugged into an active AC outlet. Adding or removing
memory modules while voltage is present may cause irreparable damage to the memory modules or system
board.
The memory module sockets have gold-plated metal contacts. When upgrading the memory, it is important
to use memory modules with gold-plated metal contacts to prevent corrosion and/or oxidation resulting from
having incompatible metals in contact with each other.
Static electricity can damage the electronic components of the computer or optional cards. Before beginning
these procedures, ensure that you are discharged of static electricity by briefly touching a grounded metal
object.
When handling a memory module, be careful not to touch any of the contacts. Doing so may damage the
module.
1. Prepare the computer for disassembly (Preparation for disassembly on page 20).
2. Remove the top cover (Top cover on page 21).
3. Remove the fan (Fan on page 37).
4. Locate the memory modules on the system board.
Item Description System Board Label Socket Color
1 SODIMM1 socket, Channel B DIMM1 Black
2 SODIMM3 socket, Channel A DIMM3 Black
Memory 41
Page: 49
5. To remove a SODIMM, press outward on the two latches on each side of the SODIMM (1) then pull the
SODIMM out of the socket (2).
6. Slide the new SODIMM into the socket at approximately a 30° angle (1) then press the SODIMM down (2)
so that the latches lock it in place.
NOTE: A memory module can be installed in only one way. Match the notch on the module with the tab
on the memory socket.
The computer automatically recognizes the additional memory when you turn on the computer.
42 Chapter 4 Removal and replacement procedures – desktop mini (DM) chassis
Page: 50
Heat sink
The heat sink is secured with four captive Torx screws.
1. Prepare the computer for disassembly (Preparation for disassembly on page 20).
2. Remove the top cover (Top cover on page 21).
3. Remove the fan (Fan on page 37).
4. In the order indicated on the heat sink, loosen the three captive Torx screws, and then lift the heat sink
out of the computer.
CAUTION: Be sure the loosen the screws in the order indicated by the numbers stamped on the heat
sink.
CAUTION: To reduce a degradation in thermal performance, be sure not to touch the thermal grease
on the surface of the processor or the heat sink.
To replace the heat sink, reverse the removal procedures.
When replacing the heat sink, be sure to install thermal pads as shown in the following image:
Heat sink 43

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