HP EliteDesk 800 G3, ProDesk 600 G3, ProDesk 400 G3 Maintenance and Service Guide
Maintenance and Service Guide
HP EliteDesk 800 G3 Desktop Mini
HP ProDesk 600 G3 Desktop Mini
HP ProDesk 400 G3 Desktop Mini
© Copyright 2017 HP Development Company,
L.P.
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 (January 2017)
Document Part Number: 913328-001
Product notices
This user guide describes features that are
common to most models. Some features may
not be available on your computer.
This guide describes features that are common
to most models. Some features may not be
available on your computer.
In accordance with Microsoft’s support policy,
HP does not support the Windows® 8 or
Windows 7 operating system on products
congured with Intel and AMD 7th generation
and forward processors or provide any
Windows 8 or Windows 7 drivers on
http://www.support.hp.com.
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.
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, at 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 airow. 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 dened by the International Standard for Safety of Information Technology
Equipment (IEC 60950-1).
iii
iv Safety warning notice
Table of contents
1 Product features ........................................................................................................................................... 1
Standard conguration features ........................................................................................................................... 1
Front panel components (EliteDesk 800 and ProDesk 600) ................................................................................. 1
Front panel components (ProDesk 400) ............................................................................................................... 2
Rear panel components (EliteDesk 800, and ProDesk 600) ................................................................................. 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 .................................................................................................................................................. 18
v
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
Front bezel dust lter .......................................................................................................................................... 23
Thermal sensor .................................................................................................................................................... 24
Memory ................................................................................................................................................................ 25
SODIMMs ............................................................................................................................................ 25
SODIMM specications ...................................................................................................................... 25
Populating SODIMM sockets ............................................................................................................. 26
Replacing SODIMMs ........................................................................................................................... 27
Hard drive ............................................................................................................................................................. 29
Hard drive cable ................................................................................................................................................... 31
Secondary fan (EliteDesk 800 G3 65 W models only) ......................................................................................... 32
Drive cage ............................................................................................................................................................ 33
M.2 PCIe solid state drive (SSD) ........................................................................................................................... 34
WLAN module ...................................................................................................................................................... 36
External antenna ................................................................................................................................................. 38
RTC battery .......................................................................................................................................................... 40
Fan ........................................................................................................................................................................ 42
Heat sink .............................................................................................................................................................. 43
Processor ............................................................................................................................................................. 46
Speaker ................................................................................................................................................................ 48
Option board ........................................................................................................................................................ 49
System board ....................................................................................................................................................... 50
System board callouts ....................................................................................................................... 52
Internal WLAN antenna cable removal/installation ............................................................................................ 53
Changing from desktop to tower conguration .................................................................................................. 56
5 Computer Setup (F10) Utility ........................................................................................................................ 57
Computer Setup (F10) Utilities ............................................................................................................................ 57
Using Computer Setup (F10) Utilities ................................................................................................ 57
Computer Setup–Main ....................................................................................................................... 59
Computer Setup—Security ............................................................................................................... 61
Computer Setup—Advanced ............................................................................................................. 63
Computer Setup—UEFI Drivers ......................................................................................................... 68
vi
Recovering the Conguration Settings ............................................................................................................... 68
6 Troubleshooting without diagnostics ............................................................................................................ 69
Safety and comfort .............................................................................................................................................. 69
Before you call for technical support .................................................................................................................. 69
Helpful hints ........................................................................................................................................................ 70
Solving general problems .................................................................................................................................... 71
Solving power problems ...................................................................................................................................... 75
Solving hard drive problems ................................................................................................................................ 76
Solving media card reader problems ................................................................................................................... 78
Solving display problems .................................................................................................................................... 79
Solving audio problems ....................................................................................................................................... 83
Solving printer problems ..................................................................................................................................... 85
Solving keyboard and mouse problems .............................................................................................................. 86
Solving hardware installation problems ............................................................................................................. 87
Solving network problems .................................................................................................................................. 89
Solving memory problems .................................................................................................................................. 92
Solving USB ash drive problems ........................................................................................................................ 93
Solving front panel component problems .......................................................................................................... 94
Solving Internet access problems ....................................................................................................................... 94
Solving software problems .................................................................................................................................. 96
7 POST error messages and diagnostic front panel LEDs and audible codes ......................................................... 97
POST numeric codes and text messages ............................................................................................................. 97
Interpreting system validation diagnostic front panel LEDs and audible codes .............................................. 102
8 Password security and resetting CMOS ........................................................................................................ 104
Resetting the password jumper ........................................................................................................................ 104
Clearing and resetting the BIOS ........................................................................................................................ 106
9 Using HP PC Hardware Diagnostics (UEFI) ..................................................................................................... 107
Downloading HP PC Hardware Diagnostics (UEFI) to a USB device .................................................................. 107
10 System backup and recovery ..................................................................................................................... 109
Backing up, restoring, and recovering in Windows 7 ........................................................................................ 109
Creating recovery media ................................................................................................................. 109
Creating recovery media using HP Recovery Manager (select models only) ............... 110
Creating recovery discs with HP Recovery Disc Creator (select models only) ............. 111
Creating recovery discs .............................................................................. 111
Backing up your information ........................................................................................ 111
vii
System Restore ............................................................................................................................... 112
System Recovery ............................................................................................................................. 112
System Recovery when Windows is responding .......................................................... 113
System Recovery when Windows is not responding .................................................... 113
System Recovery using recovery media (select models only) ..................................... 114
Using HP Recovery Disc operating system discs (select models only) ........................ 114
Backing up, restoring, and recovering in Windows 10 ...................................................................................... 115
Creating recovery media and backups ............................................................................................ 115
Creating HP Recovery media (select products only) .................................................... 116
Using Windows tools ....................................................................................................................... 117
Restore and recovery ...................................................................................................................... 117
Recovering using HP Recovery Manager ...................................................................... 118
What you need to know before you get started ........................................ 118
Using the HP Recovery partition (select products only) ............................ 118
Using HP Recovery media to recover ......................................................... 119
Changing the computer boot order ............................................................ 119
Removing the HP Recovery partition (select products only) ..................... 119
Appendix A Power Cord Set Requirements ...................................................................................................... 120
General Requirements ....................................................................................................................................... 120
Japanese Power Cord Requirements ................................................................................................................. 120
Country-Specic Requirements ........................................................................................................................ 121
Appendix B Statement of memory volatility ................................................................................................... 122
Nonvolatile memory usage ............................................................................................................................... 124
Questions and answers ..................................................................................................................................... 126
Using HP Sure Start (select models only) .......................................................................................................... 127
Appendix C Specications ............................................................................................................................. 128
Index ........................................................................................................................................................... 129
viii
1 Product features
Standard conguration 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.
Front panel components (EliteDesk 800 and ProDesk 600)
NOTE: Your computer model may look slightly dierent from the illustration in this section.
Item Icon Component Item Icon Component
1 USB Type-C SuperSpeed port with HP Sleep and
Charge*
2 USB 3.x port 6 Drive light
3 USB 3.x port with HP Sleep and Charge* 7 Dual-state power button
4 Headphone jack
*When the computer is on, the USB port connects a USB device, provides high-speed data transfer, and even when the computer is o,
charges products such as a cell phone, camera, activity tracker, or smartwatch.
NOTE: The drive light is normally white when the power is on. If it is ashing red, there is a problem with the computer and the drive
light is displaying a diagnostic code. Refer to the Maintenance and Service Guide to interpret the code.
5 Audio-out (headset)/Audio-in (microphone)
combo jack
Standard conguration features 1
Front panel components (ProDesk 400)
NOTE: Your computer model may look slightly dierent from the illustration in this section.
Item Icon Component Item Icon Component
1 USB 3.x port 4 Audio-out (headset)/Audio-in (microphone)
combo jack
2 USB 3.x port with HP Sleep and Charge* 5 Drive light
3 Headphone jack 6 Dual-state power button
*When the computer is on, the USB port connects a USB device, provides high-speed data transfer, and even when the computer is o,
charges products such as a cellphone, camera, activity tracker, or smartwatch.
NOTE: The drive light is normally white when the power is on. If it is ashing red, there is a problem with the computer and the drive
light is displaying a diagnostic code. Refer to the Maintenance and Service Guide to interpret the code.
2 Chapter 1 Product features
Rear panel components (EliteDesk 800, and ProDesk 600)
NOTE: Your computer model may look slightly dierent from the illustration in this section.
Item Icon Component Item Icon Component
1 Antenna cover 7 Optional port (DisplayPort, HDMI, VGA, Serial
or USB-CTM) (USB-CTM option has alt mode
DisplayPort or 15W output)
NOTE: The DisplayPort is optional and may
be replaced with one of the following ports:
HDMI, VGA, USB Type-C alternate mode, or
serial port.
2 Cover lock switch 8 USB 3.x ports (2) (black)
3 Security cable slot 9 USB 3.x ports (2) (black)*
4 External antenna connector 10 RJ-45 (network) jack
5 Padlock loop 11 Power connector
6 Dual-Mode DisplayPort (D++) (2)
*These USB ports allow for wake from S4/S5 hibernation system power states using the keyboard or mouse when enabled in BIOS.
Rear panel components (EliteDesk 800, and ProDesk 600) 3
Rear panel components (ProDesk 400)
NOTE: Your computer model may look slightly dierent from the illustration in this section.
Item Icon Component Item Icon Component
1 Antenna cover 7 Serial port (black)
2 Thumbscrew 8 DisplayPort (optional)
NOTE: The DisplayPort is optional and
may be replaced with one of the following
ports: HDMI, VGA, or serial port.
3 Security cable slot 9 USB 3.x ports (2) (black)*
4 External antenna connector 10 USB 2.0 ports (2) (black)
5 Padlock loop 11 RJ-45 (network) jack
6 Dual-Mode DisplayPort (D++) 12 Power connector
*These USB ports allow for wake from S4/S5 hibernation system power states using the keyboard or mouse when enabled in BIOS.
4 Chapter 1 Product features
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 support for assistance.
Serial number location 5
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
Front bezel
(1) HP ProDesk 400 G3 models
(2) HP ProDesk 600 G3 models
(3) HP EliteDesk 800 G3 models
(4) System board (includes replacement thermal material)
(5) External power supply, 90W
6 Chapter 2 Illustrated parts catalog
Item Description
90 W
65 W
(6) Memory modules (DDR4-2400)
16-GB
8-GB
4-GB
*
Intel Processors (800, 600, 400 models; include replacement thermal material)
Intel Core i7-7700, 65 W (800 G3 models only)
Intel Core i7-7700T
Intel Core i5-7600T
Intel Core i5-7500, 65 W (800 G3 models only)
Intel Core i5-7500T
Intel Core i3-7320, 65 W (800 G3 models only)
Intel Core i3-7300, 65 W (800 G3 models only)
Intel Core i3-7300T
Intel Core i3-7100, 65 W (800 G3 models only)
Intel Core i3-7100T
Intel Core i7-6700, 65 W (800 G3 models only)
Intel Core i7-6700T
Intel Core i5-6600, 65 W (800 G3 models only)
Intel Core i5-6600T
Intel Core i5-6500, 65 W (800 G3 models only)
Intel Core i7-6500T
Intel Core i3-6100, 65 W (800 G3 models only)
Intel Core i3-6100T
Intel Pentium G4620, 65 W (800 G3 models only)
Intel Pentium G4600, 65 W (800 G3 models only)
Intel Pentium G4600T
Intel Pentium G4560, 65 W (800 G3 models only)
Intel Pentium G4560T
Intel Pentium G3950, 65 W (800 G3 models only)
Intel Celeron G3930, 65 W (800 G3 models only)
Intel Celeron G3930T
*
not illustrated
Desktop Mini (DM) chassis spare parts 7
Cables
Item Description
(1) SATA cable
*
*
*
*
*
*
*
*
*
*
not illustrated
Adapter, DisplayPort to HDMI 1.4
Adapter, DisplayPort to VGA
Adapter, DisplayPort to DVI
Adapter, USB-C to USB 3.0
Adapter, USB-C to VGA
Adapter, USB-C to DisplayPort
Adapter, USB-C to HDMI
DVI cable
DisplayPort cable
8 Chapter 2 Illustrated parts catalog
Misc parts
Item Description
(1) Fan
For use with 65 W processors (800 G3 models only)
For use with 35 W processors
(2) Secondary hard drive fan (for use in EliteDesk 800 G3 65W models)
(3) Heat sink
For use with 65 W processors (800 G3 models only)
For use with 35 W processors
(4) Speaker
(5) Thermal sensor
(6) Option board, HDMI
(7) Option board, serial port
(8) Fan duct
*
Option board, DisplayPort (not illustrated)
Desktop Mini (DM) chassis spare parts 9
Item Description
*
*
*
*
*
*
*
*
*
*
*
Option board, USB Type-C (not illustrated)
Option board, VGA (not illustrated)
Screw kit
Stand
Port cover
Dust lter
EPS bracket
HP Dual Head Keyed Cable Lock
HP Dual Head Keyed Cable Lock
Grommet, hard drive
WLAN modules:
Intel 8265 802.11AC 2x2 Wi-Fi +Bluetooth M.2 Combo Card non-VPro
Intel 7265 802.11AC 2x2 Wi-Fi +Bluetooth M.2 Combo Card non-VPro
Intel 3168 802.11AC 2x2 Wi-Fi +Bluetooth M.2 Combo Card non-VPro
*
*
*
*
*
Internal antenna kit
External antenna kit
Antenna cover, internal
WLAN wiring kit
Expansion Sleeve Kit
Hard drive – I/O
I/O
Optical drive
USB 3.0 Type A-B
USB 3.0 Type A-B (short)
*
*
Dual VESA Sleeve
Mouse
USB, laser
USB, optical
USB, grey
Wireless
Antimicrobial
Hardened
*
Keyboards
USB slim
10 Chapter 2 Illustrated parts catalog
Drives
Item Description
USB slim, grey
Wireless keyboard, mouse, and receiver
Washable
USB Smart card
Conferencing
Antimicrobial
*
not illustrated
Description
Hard drives, 2.5-inch
2 TB, 5400 rpm
1 TB, 7200 rpm
1 TB, 5400 rpm, SSHD (hybrid SSD)
500 GB, 7200 rpm
500 GB, 5400 rpm, SSHD (hybrid SSD)
500 GB, 7200 rpm, OPAL 2, SED
500 GB, 5400 rpm, FIPS-140-2, OPAL 2
Solid-state drives, 2.5-inch
512 GB, FIPS-140-2
256 GB, FIPS-140-2
256 GB
128 GB
Desktop Mini (DM) chassis spare parts 11
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 nger 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 aected 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:
●
Dierent activities generate dierent amounts of static electricity.
●
Static electricity increases as humidity decreases.
Relative Humidity
Event 55% 40% 10%
Walking across carpet
Walking across vinyl oor
Motions of bench worker
Removing DIPs from plastic tube
Removing DIPs from vinyl tray
Removing DIPs from Styrofoam
Removing bubble pack from PCB
Packing PCBs in foam-lined box
These are then multi-packaged inside plastic tubes, trays, or Styrofoam.
7,500 V
3,000 V
400 V
400 V
2,000 V
3,500 V
7,000 V
5,000 V
15,000 V
5,000 V
800 V
700 V
4,000 V
5,000 V
20,000 V
11,000 V
35,000 V
12,000 V
6,000 V
2,000 V
11,500 V
14,500 V
26,500 V
21,000 V
NOTE: 700 volts can degrade a product.
12 Chapter 3 Routine care, SATA drive guidelines, and disassembly preparation
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 exible 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 t 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 oors or dissipative oor 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
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 o power and input signals before inserting and removing connectors or test equipment.
1,500
7,500
15,000
●
Use xtures made of static-safe materials when xtures must directly contact dissipative surfaces.
●
Keep work area free of nonconductive materials such as ordinary plastic assembly aids and Styrofoam.
●
Use eld service tools, such as cutters, screwdrivers, and vacuums, that are conductive.
Electrostatic discharge information 13
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 oor 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 airow.
●
Never restrict the airow 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 airow.
●
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 airow. 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
●
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 ammable 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 airow.
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
●
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
bers or dirt in conned 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 ammable 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 o.
●
Clean the mouse ball by rst 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 dierent 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 nish. U.S. screws have a silver nish 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
Cables and connectors
Most cables used throughout the unit are at, exible 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 o 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 elds
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 re and chemical burn if the battery is
handled improperly. Do not disassemble, crush, puncture, short external contacts, dispose in water or re, 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.
Service considerations 17
SATA hard drives
Serial ATA Hard Drive Characteristics
Number of pins/conductors in data cable 7/7
Number of pins in power cable 15
Maximum data cable length 39.37 in (100 cm)
Data interface voltage dierential 400-700 mV
Drive voltages 3.3 V, 5 V, 12 V
Jumpers for conguring 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 overexed. 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
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 at ribbon cable, never fold to a sharp crease. Sharp creases may damage the wires.
●
Some at 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
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 ash drive, from the computer.
3. Turn o the computer properly through the operating system, then turn o any external devices.
CAUTION: Turn o 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
Top cover
1. Prepare the computer for disassembly (Preparation for disassembly on page 20).
2. Depending on the computer model, slide the cover lock switch (1) to the left , or loosen the thumbscrew
3. Slide the access panel forward, and lift it o the computer (2).
(1) on the rear panel as shown in the following images.
NOTE: If necessary, a Torx T-15 screwdriver may be used to loosen the thumbscrew.
NOTE: Your computer model may look slightly dierent from the illustrations in this section.
To install the top cover, reverse the removal procedure.
Top cover 21
Front bezel
The front bezel is secured to the top cover by screws and tabs. The screws that secure the bezel to the top
cover are in dierent locations depending on model.
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. Remove the two Torx screws (1) that secure the bezel to the top cover.
5. Disengage the tabs on the top, interior of the bezel (2).
6. Rotate the bezel o the top cover (3).
HP ProDesk 600 G3 and 400 G3 models
HP EliteDesk 800 G3 models
7. 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
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