HP Desktop Pro A G2 Service manual
Maintenance and Service Guide
HP Desktop Pro A G2
© Copyright 2018 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, Pentium, and Core are trademarks of Intel
Corporation or its subsidiaries in the U.S. and
other countries. Windows is either a registered
trademark or trademark of Microsoft
Corporation in the United States and/or other
countries.
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 2018
Document Part Number: L43063-001
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 or
versions of Windows. Systems may require
upgraded and/or separately purchased
hardware, drivers, software or BIOS update to
take full advantage of Windows functionality.
Windows 10 is automatically updated, which is
always enabled. ISP fees may apply and
additional requirements may apply over time
for updates. Go to http://www.microsoft.com
for details.
To access the latest user guides, go to
http://www.hp.com/support, and follow the
instructions to nd your product. Then select
User Guides.
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
Front panel components ........................................................................................................................................ 2
Rear panel components ......................................................................................................................................... 3
Serial number location .......................................................................................................................................... 4
2 Illustrated parts catalog ................................................................................................................................ 5
Computer major components ................................................................................................................................ 5
Miscellaneous parts ............................................................................................................................................... 7
3 Routine care, SATA drive guidelines, and disassembly preparation .................................................................... 8
Electrostatic discharge information ...................................................................................................................... 8
Generating static ................................................................................................................................. 8
Preventing electrostatic damage to equipment ................................................................................. 9
Personal grounding methods and equipment .................................................................................... 9
Grounding the work area ..................................................................................................................... 9
Recommended materials and equipment ........................................................................................ 10
Operating guidelines ........................................................................................................................................... 10
Routine care ......................................................................................................................................................... 11
General cleaning safety precautions ................................................................................................ 11
Cleaning the computer case .............................................................................................................. 11
Cleaning the keyboard ....................................................................................................................... 12
Cleaning the monitor ......................................................................................................................... 12
Cleaning the mouse ........................................................................................................................... 12
Service considerations ......................................................................................................................................... 13
Power supply fan ............................................................................................................................... 13
Tools and software requirements ..................................................................................................... 13
Screws ............................................................................................................................................... 13
Cables and connectors ...................................................................................................................... 13
Hard drives ........................................................................................................................................ 14
Lithium coin cell battery .................................................................................................................... 14
SATA hard drives .................................................................................................................................................. 14
SATA data cable .................................................................................................................................................... 15
SMART ATA drives ................................................................................................................................................ 15
Cable management .............................................................................................................................................. 15
v
4 Removal and replacement procedures ........................................................................................................... 16
Preparation for disassembly ............................................................................................................................... 16
Access panel ......................................................................................................................................................... 17
System board connections .................................................................................................................................. 18
WLAN module ...................................................................................................................................................... 19
Expansion cards ................................................................................................................................................... 20
Front bezel ........................................................................................................................................................... 23
Removing bezel blank ......................................................................................................................................... 24
Drives ................................................................................................................................................................... 25
Drive positions ................................................................................................................................... 25
Removing and installing drives ......................................................................................................... 25
Removing the optical drive ............................................................................................. 25
Installing an optical drive ............................................................................................... 27
Removing the drive cage ................................................................................................ 28
Installing the drive cage .................................................................................................. 29
Removing a 3.5-inch hard drive ...................................................................................... 29
Installing a 3.5-inch hard drive ....................................................................................... 30
Removing a 2.5-inch hard drive ...................................................................................... 31
Installing a 2.5-inch hard drive ....................................................................................... 31
Memory ................................................................................................................................................................ 33
Populating DIMM sockets .................................................................................................................. 33
Removing and installing DIMMs ........................................................................................................ 34
Fan duct ................................................................................................................................................................ 36
Fan sink ................................................................................................................................................................ 37
Processor ............................................................................................................................................................. 39
Power supply ....................................................................................................................................................... 40
Wireless antenna ................................................................................................................................................. 42
System board ....................................................................................................................................................... 43
5 Troubleshooting without diagnostics ............................................................................................................ 45
Safety and comfort .............................................................................................................................................. 45
Before you call for technical support .................................................................................................................. 45
Helpful hints ........................................................................................................................................................ 46
Solving general problems .................................................................................................................................... 47
Solving power problems ...................................................................................................................................... 50
Solving hard drive problems ................................................................................................................................ 51
Solving media card reader problems ................................................................................................................... 53
Solving display problems .................................................................................................................................... 54
Solving audio problems ....................................................................................................................................... 58
Solving printer problems ..................................................................................................................................... 60
Solving keyboard and mouse problems .............................................................................................................. 61
vi
Solving hardware installation problems ............................................................................................................. 62
Solving network problems .................................................................................................................................. 64
Solving memory problems .................................................................................................................................. 66
Solving CD-ROM and DVD problems .................................................................................................................... 67
Solving USB ash drive problems ........................................................................................................................ 69
Solving front panel component problems .......................................................................................................... 70
Solving Internet access problems ....................................................................................................................... 71
Solving software problems .................................................................................................................................. 71
6 Computer Setup (F10) Utility ........................................................................................................................ 73
Computer Setup (F10) Utilities ............................................................................................................................ 73
Using Computer Setup (F10) Utilities ................................................................................................ 73
Computer Setup–Main ....................................................................................................................... 74
Computer Setup—Security ............................................................................................................... 75
Computer Setup—Conguration ...................................................................................................... 76
Computer Setup—Boot Options ....................................................................................................... 78
Computer Setup—Exit ...................................................................................................................... 79
7 Backing up, restoring, and recovering ........................................................................................................... 80
Backing up information and creating recovery media ........................................................................................ 80
Using Windows tools ......................................................................................................................... 80
Using the HP Cloud Recovery Download Tool to create recovery media (select products only) ..... 80
Restoring and recovery ........................................................................................................................................ 81
Restoring, resetting, and refreshing using Windows tools .............................................................. 81
Recovering using HP Recovery media ............................................................................................... 81
Changing the computer boot order ................................................................................................... 81
8 POST error messages and diagnostic front panel LEDs and audible codes ......................................................... 82
POST numeric codes and text messages ............................................................................................................. 82
Interpreting system validation diagnostic front panel LEDs and audible codes ................................................ 87
9 Password security and resetting CMOS .......................................................................................................... 89
Resetting CMOS .................................................................................................................................................... 89
Resetting the password jumper .......................................................................................................................... 89
10 Using HP PC Hardware Diagnostics .............................................................................................................. 91
Using HP PC Hardware Diagnostics Windows (select products only) ................................................................. 91
Downloading HP PC Hardware Diagnostics Windows ....................................................................... 91
Downloading the latest HP PC Hardware Diagnostics Windows version ....................... 92
vii
Downloading HP Hardware Diagnostics Windows by product name or number
(select products only) ..................................................................................................... 92
Installing HP PC Hardware Diagnostics Windows ............................................................................. 92
Using HP PC Hardware Diagnostics UEFI ............................................................................................................. 92
Starting HP PC Hardware Diagnostics UEFI ....................................................................................... 93
Downloading HP PC Hardware Diagnostics UEFI to a USB ash drive .............................................. 93
Downloading the latest HP PC Hardware Diagnostics UEFI version .............................. 93
Downloading HP PC Hardware Diagnostics UEFI by product name or number
(select products only)
Using Remote HP PC Hardware Diagnostics UEFI settings (select products only) ............................................. 94
Downloading Remote HP PC Hardware Diagnostics UEFI ................................................................. 94
Downloading the latest Remote HP PC Hardware Diagnostics UEFI version ................. 94
Downloading Remote HP PC Hardware Diagnostics UEFI by product name or
number ............................................................................................................................ 94
Customizing Remote HP PC Hardware Diagnostics UEFI settings .................................................... 94
11 Battery replacement .................................................................................................................................. 96
12 Power cord set requirements ...................................................................................................................... 99
General Requirements ......................................................................................................................................... 99
Japanese Power Cord Requirements ................................................................................................................... 99
Country-Specic Requirements ........................................................................................................................ 100
..................................................................................................... 93
13 Statement of memory volatility ................................................................................................................ 101
Nonvolatile memory usage ............................................................................................................................... 103
Questions and answers ..................................................................................................................................... 105
Using HP Sure Start (select models only) .......................................................................................................... 106
14 Specications .......................................................................................................................................... 107
Index ........................................................................................................................................................... 108
viii
1 Product 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.
1
Front panel components
Drive conguration may vary by model. Some models have a bezel blank covering the slim optical drive bay.
Item Description
(1) Slim optical drive (optional)
(2) Power button
(3) Audio-out (headphone) jack
(4) USB SuperSpeed ports (2)
(5) USB 2.0 ports (2)
NOTE: The light on the power button 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 87 to interpret the code.
2 Chapter 1 Product features
Rear panel components
Item Description
(1) Audio-in (microphone) jack
(2) Audio-out (headphone) jack
(3) HDMI port
(4) VGA port
(5) RJ-45 (network) jack
(6) USB 2.0 ports (4)
(7) Power cord connector
(8) Security cable slot
(9) Optional serial port
NOTE: When a graphics card is installed in one of the system board slots, the video connectors on the graphics card and/or the
integrated graphics on the system board may be used. The specic graphics card installed and software conguration will determine
the behavior.
The system board graphics can be disabled by changing settings in BIOS F10 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
NOTE: HP continually improves and changes product parts. For complete and current information on
supported parts for your computer, go to http://partsurfer.hp.com, select your country or region, and then
follow the on-screen instructions.
Computer major components
Item Description
(1) Fan sink (includes replacement thermal material)
(2) System board (includes replacement thermal material)
(3) Fan duct
(4) Chassis
(5) Power supply
310 W
180 W
Computer major components 5
Item Description
(6) Optical drive
DVD±RW drive
DVD-ROM drive
(7) Hard drive, 3.5-inch
2 TB, 7200-rpm, 3.5-inch
1 TB, 7200-rpm, 3.5-inch
1 TB, 7200-rpm, 7.0 mm
500 GB, 7200-rpm, 3.5-inch
500 GB, 7200-rpm, 7.0 mm
*
Solid-state drive (2.5-inch, SATA-3, TLC)
256 GB
256 GB (Brazil only)
128 GB
128 GB (Brazil only)
(8) Drive cage
(9) Processor (includes replacement thermal material)
Ryzen 5 PRO 2400G processor
Ryzen 3 PRO 2200GE processor
Ryzen 3 PRO 2100GE processor
(10) Front bezel
*
Memory module (UDIMM, non-ECC, 1.2v, PC4-2666)
16 GB
8 GB
8 GB (Brazil only)
4 GB
*
SATA data cable
120 mm, 2 straight ends
220 mm, 1 straight end, 1 angled end
150 mm, 2 straight ends
*
*
*
*
*
SATA drive power cable
SATA drive power cable, second hard drive, 240 mm/150 mm
WLAN module (Realtek 802.11ac 2×2 with Bluetooth® 4.2)
Optional second serial port
Graphics cards (full-height, PCIe ×16)
6 Chapter 2 Illustrated parts catalog
Item Description
AMD Radeon™ R7 430, 2 GB, 2 DisplayPorts
AMD Radeon R7 430, 2 GB, VGA+DisplayPort
*
*
*
not illustrated
Intel PRO/1000 Single Port GbE NIC
Printer port option card PCIe ×1
Miscellaneous parts
Description
Internal single wireless antenna
Antenna cover
USB-to-serial port adapter
PS/2 module
Bezel blank, slim optical drive
Keyboard
USB Essential
PS/2 slim
Antimicrobial
USB Katydid
Mouse
PS2, optical
USB, optical
USB
USB, antimicrobial
USB, hardened
Power cord
Miscellaneous parts 7
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 the following about static electricity:
●
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
NOTE: 700 volts is enough to degrade a product.
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
8 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 a container on a grounded surface before removing items from it.
●
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 9
Recommended materials and equipment
Materials and equipment that are recommended for use in preventing static electricity include the following:
●
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 in) 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.
10 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 11 before cleaning the computer.
To clean the computer case, follow the procedures described below:
●
To remove stains or dirt, use one of the following:
–
Alcohol-free glass-cleaning uid
–
Solution of water and mild soap
–
Dry microber cleaning cloth or a chamois (static-free cloth without oil)
–
Static-free cloth wipes
●
For stronger stains, use a mild dishwashing liquid diluted with water. Rinse well by wiping the surface
with a cloth or swab dampened with clear water.
CAUTION: Avoid strong cleaning solvents or germicidal wipes that can permanently damage your
computer. If you are not sure that a cleaning product is safe for your computer, check the product
contents to make sure that ingredients such as alcohol, acetone, ammonium chloride, methylene
chloride, and hydrocarbons are not included in the product.
●
For stubborn stains, use isopropyl (rubbing) alcohol. No rinsing is needed because the alcohol will
evaporate quickly and not leave a residue.
●
After cleaning, always wipe the unit with a clean, lint-free cloth.
●
Periodically clean air vents on bezel and power supply. Also clean the internal chassis fans, heat sink
fans, and GPU fans (if present). For information about accessing internal components, see Removal and
replacement procedures on page 16. Dirty vents and fans can contribute to overheating, which leads
to shortened product life.
CAUTION: To reduce the risk of damage to computer components due to static discharge, do not use a
vacuum to remove debris.
Routine care 11
Cleaning the keyboard
Follow all safety precautions in General cleaning safety precautions on page 11 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 11.
When cleaning debris from under the keys, review all rules in General cleaning safety precautions on page 11
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
because too much air pressure can dislodge lubricants applied under the wide keys.
●
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 the monitor
●
Wipe the monitor screen with a clean cloth moistened with water or with a towelette designed for
cleaning monitors.
CAUTION: 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 11.
Cleaning the mouse
1. If the mouse has an on/o switch, turn it o.
2. Wipe the body of the mouse with a damp cloth.
3. Clean the following components as directed:
–
Laser or LED—Use a cotton swab dampened with an appropriate cleaning solution (see Cleaning
the computer case on page 11). Gently brush out any dust around the laser or LED, and then wipe
again with a dry swab. Do not wipe the laser or LED directly with the swab
–
Scroll wheel—Spray canned, pressurized air into the gap between the scroll wheel and the click
buttons. Do not blow air directly on one spot for very long or condensation can form.
–
Roller ball—Remove and clean the roller ball, remove any debris from the ball socket, wipe out the
socket with a dry cloth, and reassemble the mouse.
12 Chapter 3 Routine care, SATA drive guidelines, and disassembly preparation
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
●
Flat-bladed screwdriver (may sometimes be used in place of the Torx screwdriver)
●
Phillips P2 screwdriver
●
Diagnostics software
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.
Service considerations 13
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.
For instructions on replacement procedures, see the appropriate removal and replacement chapter in this
guide for the chassis you are working on.
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 140⁰F (60⁰C). Do not attempt to recharge the battery.
NOTE: Batteries, battery packs, and accumulators should not be disposed of together with the general
household waste. In order to forward them to recycling or proper disposal, please use the public collection
system or return them to HP, their authorized partners, or their agents.
SATA hard drives
Serial ATA Hard Drive Characteristics
Number of pins/conductors in data cable 7/7
Number of pins in power cable 15
Maximum data cable length 100 cm (39.37 in)
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
14 Chapter 3 Routine care, SATA drive guidelines, and disassembly preparation
SATA data cable
Always use an HP approved SATA 6.0 Gb/s cable. It is fully backward 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.
Cable management
Always follow good cable management practices when working inside the computer.
●
Keep cables away from major heat sources like the fan 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.
●
Use cable routing and retention features built into the chassis or drive cage where possible.
SATA data cable 15
4 Removal and replacement procedures
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 8 for initial safety procedures.
1. Remove/disengage any security devices that prohibit opening the computer.
2. Remove all removable media, such as compact discs or USB ash drives, from the computer.
3. Turn o the computer properly through the operating system, and turn o any external devices.
4. Disconnect the power cord from the AC outlet and disconnect any external devices.
IMPORTANT: You must disconnect the power cord and wait approximately 30 seconds for the power to
drain before adding or removing memory modules. Regardless of the power-on state, voltage is always
supplied to the memory modules as long as the computer is plugged into an active AC outlet. Adding or
removing memory modules while voltage is present may cause irreparable damage to the memory
modules or system board.
5. 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.
IMPORTANT: The screws used in the computer are of dierent thread sizes and lengths; using the wrong
screw in an application may damage the unit.
16 Chapter 4 Removal and replacement procedures
Access panel
To access internal components, you must remove the access panel:
1. Prepare the computer for disassembly (Preparation for disassembly on page 16).
2. Loosen the Torx screw (1).
3. Slide the access panel back about 2 cm (0.75 in), and then lift it o the computer (2).
To replace the access panel, reverse the disassembly procedures.
Access panel 17
System board connections
Refer to the following illustration and table to identify the system board connectors for your model.
Item Label Component Item Label Component
(1) PWRCPU 4-pin processor power (9) PWR Power supply
(2) CPU_FAN Processor fan (10) M2_WIFI WLAN module
(3) DIMM1 Memory module (11) PCI PCI expansion card
(4) DIMM2 Memory module (12) X1PCIEXP1 PCIe ×1 expansion card
(5) BAT RTC battery (13) X16PCIEXP PCIe ×16 expansion card
(6) SATA1 Any SATA device other than
the primary hard drive
(7) SATA0 Primary hard drive (15) PROCESSOR Processor
(8) SATAPWR Drive power
(14) CLR_CMOS/
PSWD
Clear system passwords
18 Chapter 4 Removal and replacement procedures
WLAN module
The WLAN module installs into a slot on the system board.
For a list of available WLAN modules, see Computer major components on page 5.
To remove the WLAN module:
1. Prepare the computer for disassembly (Preparation for disassembly on page 16).
2. Remove the access panel (Access panel on page 17)
3. Disconnect the antenna cable (1) from the terminal on the WLAN module.
4. Remove the Phillips screw (2) that secures the WLAN module to the computer. (The edge of the module
opposite the slot rises away from the computer.)
5. Remove the WLAN module (3) by pulling the module away from the slot at an angle.
NOTE: WLAN modules are designed with a notch to prevent incorrect insertion.
Reverse this procedure to install the WLAN module.
WLAN module 19
Expansion cards
The computer has one PCI Express ×1 expansion socket, one PCI Express ×16 expansion socket, and one PCI
expansion socket.
Item Expansion slot
(1) PCI Express 3.0, ×16
(2) PCI Express 2.0, ×1
(3) PCI 2.3
NOTE: You can install a PCI Express ×1, ×8, or ×16 expansion card in the PCI Express ×16 socket.
For dual graphics card congurations, the rst (primary) card must be installed in the PCI Express ×16 socket.
To remove, replace, or add an expansion card:
1. Prepare the computer for disassembly (Preparation for disassembly on page 16).
2. Remove the access panel (Access panel on page 17)
3. Locate the correct vacant expansion socket on the system board and the corresponding expansion slot
on the back of the computer chassis.
4. Before installing an expansion card, remove the expansion slot cover or the existing expansion card.
NOTE: Before removing an installed expansion card, disconnect any cables that may be attached to
the expansion card.
a. If you are removing a PCI Express ×16 card, remove the Torx screw that secures the card to the
back of the chassis (1). Pull the retention arm on the back of the expansion socket (2) away from
20 Chapter 4 Removal and replacement procedures
the card, and then carefully rock the card back and forth until the connectors pull free from the
socket. Lift the card straight up (3) to remove it. Be sure not to scrape the card against other
components.
b. If you are removing a PCI Express ×1 or PCI expansion card, remove the Torx screw that secures the
card to the back of the chassis (1), and then lift the card straight up (2) to remove it. Be sure not to
scrape the card against other components.
TIP: PCI and PCI Express ×1 sockets do not have a retention arm.
NOTE: The following image shows a PCIe expansion card.
Expansion cards 21
c. If you are installing an expansion card in a vacant socket, you must use a at-bladed screwdriver to
pry out the metal shield on the rear panel that corresponds to the expansion slot you want to use.
5. Store the removed card in antistatic packaging.
6. If you are not installing a new expansion card, install an expansion slot cover to close the open slot.
IMPORTANT: After removing an expansion card, you must replace it with a new card or expansion slot
cover for proper cooling of internal components during operation.
7. To install a new expansion card, hold the card just above the expansion socket on the system board, and
then move the card toward the rear of the chassis so that the bottom of the bracket on the card slides
into the small slot on the chassis. Press the card straight down into the expansion socket on the system
board (1). Install the screw (2).
NOTE: The following image shows a PCIe expansion card.
TIP: Installation procedures are the same for all PCI expansion cards.
NOTE: When installing an expansion card, press rmly on the card so that the whole connector seats
properly in the expansion card socket.
22 Chapter 4 Removal and replacement procedures
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