HP EliteDesk 800 G2 TWR Maintenance and Service Guide
Maintenance and Service Guide
HP EliteDesk 800 G2 TWR Business PC
© 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: 823455-001
Product notice
This 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 8. This computer may require
upgraded and/or separately purchased
hardware, drivers and/or software to take full
advantage of Windows 8 functionality. See
http://www.microsoft.com for details.
This computer may require upgraded and/or
separately purchased hardware and/or a DVD
drive to install the Windows 7 software and
take full advantage of Windows 7 functionality.
See http://windows.microsoft.com/en-us/
windows7/get-know-windows-7 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 refund subject to the
refund policy of your place of purchase.
For any further information or to request a full
refund of the computer, please contact your
local point of sale (the 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).
iii
iv Safety warning notice
Table of contents
1 Product features ........................................................................................................................................... 1
Standard conguration features ........................................................................................................................... 1
Front panel components ........................................................................................................................................ 2
Rear panel components ......................................................................................................................................... 3
Serial number location .......................................................................................................................................... 4
2 Illustrated parts catalog ................................................................................................................................ 5
Microtower (MT) chassis spare parts ..................................................................................................................... 5
Computer major components ............................................................................................................. 5
Misc parts ............................................................................................................................................. 7
Drives ................................................................................................................................................... 9
3 Routine care, SATA drive guidelines, and disassembly preparation .................................................................. 10
Electrostatic discharge information .................................................................................................................... 10
Generating static ............................................................................................................................... 10
Preventing electrostatic damage to equipment ............................................................................... 11
Personal grounding methods and equipment .................................................................................. 11
Grounding the work area ................................................................................................................... 11
Recommended materials and equipment ........................................................................................ 12
Operating guidelines ........................................................................................................................................... 12
Routine care ......................................................................................................................................................... 13
General cleaning safety precautions ................................................................................................ 13
Cleaning the Computer Case ............................................................................................................. 13
Cleaning the keyboard ....................................................................................................................... 13
Cleaning the monitor ......................................................................................................................... 14
Cleaning the mouse ........................................................................................................................... 14
Service considerations ......................................................................................................................................... 14
Power supply fan ............................................................................................................................... 14
Tools and software Requirements .................................................................................................... 14
Screws ............................................................................................................................................... 15
Cables and connectors ...................................................................................................................... 15
Hard Drives ........................................................................................................................................ 15
Lithium coin cell battery .................................................................................................................... 15
SATA hard drives .................................................................................................................................................. 16
SATA hard drive cables ......................................................................................................................................... 16
SATA data cable ................................................................................................................................. 16
v
SMART ATA drives ................................................................................................................................................ 16
Cable management .............................................................................................................................................. 17
4 Removal and replacement procedures – Microtower (MT) chassis .................................................................... 18
Preparation for disassembly ............................................................................................................................... 18
Access panel ......................................................................................................................................................... 19
Front bezel ........................................................................................................................................................... 20
Front bezel security ............................................................................................................................................. 21
Removing bezel blanks ........................................................................................................................................ 22
Memory ................................................................................................................................................................ 23
DIMMs ................................................................................................................................................ 23
DDR4-SDRAM DIMMs ......................................................................................................................... 23
Populating DIMM sockets .................................................................................................................. 23
Installing DIMMs ................................................................................................................................ 24
Expansion cards ................................................................................................................................................... 26
WLAN module ...................................................................................................................................................... 30
Drives ................................................................................................................................................................... 32
Drive positions ................................................................................................................................... 34
System board connections ................................................................................................................ 35
Installing and removing drives .......................................................................................................... 36
Removing a 5.25-inch drive ............................................................................................ 37
Installing a 5.25-inch drive ............................................................................................. 38
Removing a 9.5 mm slim optical drive ........................................................................... 39
Installing a 9.5 mm slim optical drive ............................................................................ 40
Removing a 3.5-inch or 2.5-inch hard drive ................................................................... 41
Installing a 3.5-inch or 2.5-inch hard drive .................................................................... 43
Drive power cable ................................................................................................................................................ 48
Front I/O assembly ............................................................................................................................................... 49
Power switch ........................................................................................................................................................ 51
Fan sink ................................................................................................................................................................ 53
Processor ............................................................................................................................................................. 54
Speaker ................................................................................................................................................................ 55
Card reader ........................................................................................................................................................... 56
Rear chassis fan ................................................................................................................................................... 57
Hood lock (solenoid) ............................................................................................................................................ 58
Hood sensor ......................................................................................................................................................... 59
Power supply ....................................................................................................................................................... 60
System board ....................................................................................................................................................... 62
System board callouts ....................................................................................................................... 64
vi
5 Computer Setup (F10) Utility ........................................................................................................................ 66
Computer Setup (F10) Utilities ............................................................................................................................ 66
Using Computer Setup (F10) Utilities ................................................................................................ 66
Computer Setup–Main ....................................................................................................................... 68
Computer Setup—Security ............................................................................................................... 70
Computer Setup—Advanced ............................................................................................................. 72
Recovering the Conguration Settings ............................................................................................................... 77
6 Troubleshooting without diagnostics ............................................................................................................ 78
Safety and comfort .............................................................................................................................................. 78
Before you call for technical support .................................................................................................................. 78
Helpful hints ........................................................................................................................................................ 79
Solving general problems .................................................................................................................................... 80
Solving power problems ...................................................................................................................................... 84
Solving hard drive problems ................................................................................................................................ 85
Solving media card reader problems ................................................................................................................... 87
Solving display problems .................................................................................................................................... 88
Solving audio problems ....................................................................................................................................... 93
Solving printer problems ..................................................................................................................................... 95
Solving keyboard and mouse problems .............................................................................................................. 96
Solving Hardware Installation Problems ............................................................................................................. 98
Solving Network Problems .................................................................................................................................. 99
Solving memory problems ................................................................................................................................ 102
Solving CD-ROM and DVD problems .................................................................................................................. 103
Solving USB ash drive problems ..................................................................................................................... 106
Solving front panel component problems ........................................................................................................ 107
Solving Internet access problems ..................................................................................................................... 107
Solving software problems ............................................................................................................................... 109
7 POST error messages and diagnostic front panel LEDs and audible codes ....................................................... 110
POST numeric codes and text messages .......................................................................................................... 110
Interpreting system validation diagnostic front panel LEDs and audible codes .............................................. 115
8 Password security and resetting CMOS ........................................................................................................ 117
Resetting the password jumper ........................................................................................................................ 117
Clearing and resetting the BIOS ........................................................................................................................ 119
9 Using HP PC Hardware Diagnostics (UEFI) ..................................................................................................... 120
Downloading HP PC Hardware Diagnostics (UEFI) to a USB device .................................................................. 120
vii
10 System backup and recovery ..................................................................................................................... 122
Backing up, restoring, and recovering in Windows 10 ...................................................................................... 122
Creating recovery media and backups ............................................................................................ 122
Creating HP Recovery media (select products only) .................................................... 122
Using Windows tools ....................................................................................................................... 124
Restore and recovery ...................................................................................................................... 124
Recovering using HP Recovery Manager ...................................................................... 124
What you need to know before you get started ........................................ 124
Using the HP Recovery partition (select products only) ............................ 125
Using HP Recovery media to recover ......................................................... 125
Changing the computer boot order ............................................................ 126
Removing the HP Recovery partition (select products only) ..................... 126
Backing up, restoring, and recovering in Windows 8.1 or Windows 8 .............................................................. 126
Creating recovery media and backups ............................................................................................ 126
Restoring and recovering using Windows tools ............................................................................. 127
Using Reset when the system is not responding ......................................................... 127
Recovery using the Windows recovery USB ash drive ............................................... 128
Recovery using Windows operating system media (purchased separately) ............... 128
Backing up, restoring, and recovering in Windows 7 ........................................................................................ 128
Creating recovery media ................................................................................................................. 129
Creating recovery media using HP Recovery Manager (select models only) ............... 129
Creating recovery discs with HP Recovery Disc Creator (select models only) ............. 130
Creating recovery discs .............................................................................. 131
Backing up your information ........................................................................................ 131
System Restore ............................................................................................................................... 132
System Recovery ............................................................................................................................. 132
System Recovery when Windows is responding .......................................................... 132
System Recovery when Windows is not responding .................................................... 133
System Recovery using recovery media (select models only) ..................................... 133
Using HP Recovery Disc operating system discs (select models only) ........................ 134
Appendix A Battery replacement ................................................................................................................... 136
Appendix B Power Cord Set Requirements ...................................................................................................... 139
General Requirements ....................................................................................................................................... 139
Japanese Power Cord Requirements ................................................................................................................. 139
Country-Specic Requirements ........................................................................................................................ 140
Appendix C Statement of Volatility ................................................................................................................ 141
viii
Appendix D Specications ............................................................................................................................. 142
TWR Specications ............................................................................................................................................ 142
Index ........................................................................................................................................................... 144
ix
x
1 Product features
Standard conguration features
Features may vary depending on the model. For support assistance and to learn more about the hardware
and software installed on your computer model, run the HP Support Assistant utility.
NOTE: This computer model can be used in a tower orientation or a desktop orientation.
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.
Standard conguration features 1
Front panel components
Drive conguration may vary by model. Some models have a bezel blank covering one or more drive bays.
1 Hard Drive Activity Light 6 Dual-State Power Button
2 5.25-inch Half-Height Drive Bay (behind bezel) 7 Slim Optical Drive (optional)
3 SD Card Reader (optional) 8 USB 2.0 Charging (powered) Port (black)
4 USB 2.0 Port (black) 9 USB 3.0 Ports (blue)
5 Microphone/Headphone Connector 10 Headphone Connector
NOTE: When a device is plugged into the Microphone/Headphone Connector, a dialog box will pop up asking if you want to
use the connector for a microphone Line-In device or a headphone. You can recongure the connector at any time by
double-clicking the Audio Manager icon in the Windows taskbar.
NOTE: The USB 2.0 Charging Port also provides current to charge a device such as a Smart Phone. The charging current is
available whenever the power cord is plugged into the system, even when the system is o.
NOTE: The Power On Light is normally white when the power is on. If it is ashing red, there is a problem with the
computer and it is displaying a diagnostic code. Refer to Interpreting system validation diagnostic front panel LEDs and
audible codes on page 115 to interpret the code.
2 Chapter 1 Product features
Rear panel components
1 Power Cord Connector 7 PS/2 Mouse Connector (green)
2 PS/2 Keyboard Connector (purple) 8 Serial Connector
3 DisplayPort Monitor Connectors 9 RJ-45 Network Connector
4 VGA Monitor Connector 10 USB 3.0 Ports with Wake from S4/S5
feature (blue)
5 USB 3.0 Ports (blue) 11 Line-In Audio Connector (blue)
6 Line-Out Connector for powered audio devices
(green)
NOTE: An optional second serial port and an optional parallel port are available from HP.
If using a USB keyboard, HP recommends connecting the keyboard to one of the USB 3.0 ports with the wake from S4/S5
feature. The wake from S4/S5 feature is also supported on the PS/2 connectors if enabled in BIOS F10 Setup.
When a device is plugged into the blue Line-In Audio Connector, a dialog box will pop up asking if you want to use the
connector for a line-in device or a microphone. You can recongure the connector at any time by double-clicking the Audio
Manager icon in the Windows taskbar.
When a graphics card is installed in one of the system board slots, the video connectors on the graphics card and the
integrated graphics on the system board may be used at the same time. However, for such a conguration, only the display
connected to the discrete graphics card will display POST messages.
The system board graphics can be disabled by changing settings in Computer Setup.
Rear panel components 3
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.
4 Chapter 1 Product features
2 Illustrated parts catalog
Microtower (MT) chassis spare parts
Computer major components
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.
Microtower (MT) chassis spare parts 5
Item Description
(1) Access panel
(2) Front bezel
(3) System board (includes replacement thermal material)
(4) Extension board
(5) Power supply
400W, 92% ecient
280W, 92% ecient
280W, 85% ecient
280W, standard
(6) Memory modules (PC4-17000, 2133-MHz)
16-GB
8-GB
4-GB
* Processors (include replacement thermal material; not illustrated))
Intel Core i7-6700 processor
Intel Core i5-6600 processor
Intel Core i5-6500 processor
6 Chapter 2 Illustrated parts catalog
Misc parts
Item Description
(1) Fan
(2) Fan sink (includes replacement thermal material)
(3) Speaker
(4) Hood sensor
(5) Solenoid lock
(6) Secure Digital (SD) card reader
(7) Front I/O assembly
(8) SATA drive power cable
(9) Power switch
(10) SATA data cable, 17.7 inch, 2 straight ends
(11) SATA data cable, 14 inch, 1 straight end, 1 angled end
* Printer port, PCI card
* nVIDIA GT730 2 GB graphics card (DDR3, PCIex8)
* AMD R9 350 2 GB graphics card (DDR5, PCIe x16)
* GeForce GTX 960 2GB graphics card (DDR5, PCIex16)
* Serial port, PCI card
* WLAN modules
Microtower (MT) chassis spare parts 7
Item Description
Broadcom BCM943228Z 802.11n 2x2 DualBand Combo PCIe x1 Card
Intel 7265 802.11ac 2x2 DualBand Combo PCIe x1 Card
Intel 8260 2x2 Dual Band 802.11ac WLAN/ Bluetooth Combo
Intel 3165 1x1 Dual Band 802.11ac WLAN/ Bluetooth Combo
* Bezel blank, 5.25-inch optical drive
* Bezel blank, slim optical drive
* Keyed cable lock
* DisplayPort cable
* USB 3.1 Type Cx1 PCIe x1 card
* Hard drive grommet
* Adapters
DisplayPort to HDMI 1.4
DisplayPort to VGA
DisplayPort to DVI
USB-C to USB 3.0
* Mouse
PS2, optical
USB, laser
USB, optical
Antimicrobial
Washable
Wireless
* Keyboards
PS/2
PS/2 slim
USB
HP USB slim
HP USB Conferencing
Wireless keyboard, mouse, and dongle
USB/PS2 Washable
Smart card
8 Chapter 2 Illustrated parts catalog
Drives
Description
Hard drives
2-TB, 7200-rpm
1-TB, 7200-rpm, 3.5-inch
1-TB, 7200-rpm, 2.5-inch
1-TB, hybrid SSD, 3.5-inch or 2.5-inch
500-GB, 7200-rpm, 2.5-inch, SED
500 GB, 7200 rpm, 3.5-inch or 2.5-inch
500-GB, 7200-rpm, 2.5-inch, OPAL2, self-encrypting drive (SED)
500-GB, 5400-rpm, 2.5-inch, FIPS
500-GB, hybrid SSD, 2.5-inch
500-GB, 5400-rpm, 2.5-inch, 5 mm
Solid-state drives
512 GB Solid-state Drive (SSD), 3D, NAND
512-GB Solid-state Drive (SSD), M.2, 2280SS, PCIe
256-GB Solid-state Drive (SSD), self-encrypting (SED)
256-GB Solid-state Drive (SSD)
256-GB Solid-state Drive (SSD), TLC
256-GB Solid-state Drive (SSD), M.2, 2280SS, PCIe
256 GB Solid-state Drive (SSD), 3D, NAND
180 GB Solid-state Drive (SSD)
180 GB Solid-state Drive (SSD), OPAL2, MLC
128-GB Solid-state Drive (SSD), self-encrypting drive (SED)
128-GB Solid-state Drive (SSD)
128-GB Solid-state Drive (SSD), 3D, NAND
128-GB Solid-state Drive (SSD), M.2, 2280SS, PCIe
120-GB Solid-state Drive (SSD)
120-GB Solid-state Drive (SSD), OPAL2, MLC
Microtower (MT) chassis spare parts 9
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.
10 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.
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.
Static Shielding Protection Levels
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 11
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.
12 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 13 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 13 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 13.
When cleaning debris from under the keys, review all rules in General cleaning safety precautions on page 13
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 13
●
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 13.
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 13.
Service considerations
Listed below are some of the considerations that you should keep in mind during the disassembly and
assembly of the computer.
Power supply fan
The power supply fan is a variable-speed fan based on the temperature in the power supply.
CAUTION: The cooling fan is always on when the computer is in the “On” mode. The cooling fan is o when
the computer is in “Standby,” “Suspend,” or “O” modes.
You must disconnect the power cord from the power source before opening the computer to prevent system
board or component damage.
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
14 Chapter 3 Routine care, SATA drive guidelines, and disassembly preparation
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.
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.
Service considerations 15
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
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.
16 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 17
4 Removal and replacement procedures –
Microtower (MT) 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.
Preparation for disassembly
See Routine care, SATA drive guidelines, and disassembly preparation on page 10 for initial safety procedures.
1. Remove/disengage any security devices that prohibit opening the computer.
2. Close any open software applications.
3. Exit the operating system.
4. Remove any compact disc or media card from the computer.
5. Turn o the computer and any peripheral devices that are connected to it.
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.
6. Disconnect the power cord from the electrical outlet and then from the computer.
7. As applicable, lay the computer down on its side to achieve a safe working position.
NOTE: During disassembly, label each cable as you remove it, noting its position and routing. Keep all
screws with the units removed.
CAUTION: The screws used in the computer are of dierent thread sizes and lengths; using the wrong screw
in an application may damage the unit.
18 Chapter 4 Removal and replacement procedures – Microtower (MT) chassis
Access panel
To access internal components, you must remove the access panel:
1. Prepare the computer for disassembly (Preparation for disassembly on page 18)
2. Pull up the access panel handle (1), and then lift the panel o the computer (2).
To replace the access panel, reverse the disassembly procedures.
Access panel 19
Front bezel
1. Prepare the computer for disassembly (Preparation for disassembly on page 18)
2. Remove the access panel (Access panel on page 19)
3. Lift up the three tabs on the side of the bezel (1), and then rotate the bezel o the chassis (2).
To replace the front bezel, reverse the disassembly procedures.
20 Chapter 4 Removal and replacement procedures – Microtower (MT) chassis
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