HP EliteDesk 800 G3 TWR, EliteDesk 880 G3 TWR Maintenance and Service Guide

Maintenance and Service Guide

HP EliteDesk 800 G3 TWR Business PC HP EliteDesk 880 G3 TWR Business PC

© Copyright 2017 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: January 2017

Document Part Number: 913316-001

Product notices

This user guide describes features that are common to most models. Some features may not be available on your computer.

This guide describes features that are common to most models. Some features may not be available on your computer.

In accordance with Microsoft’s support policy, HP does not support the Windows® 8 or Windows 7 operating system on products con gured with Intel and AMD 7th generation and forward processors or provide any Windows 8 or Windows 7 drivers on http://www.support.hp.com.

Not all features are available in all editions of Windows. This computer may require upgraded and/or separately purchased hardware, drivers and/or software to take full advantage of Windows functionality. Go to http://www.microsoft.com for details.

Software terms

By installing, copying, downloading, or otherwise using any software product preinstalled on this computer, you agree to be bound by the terms of the HP End User License Agreement (EULA). If you do not accept these license terms, your sole remedy is to return the entire unused product (hardware and software) within 14 days for a full refund subject to the refund policy of your seller.

For any further information or to request a full refund of the price of the computer, please contact your seller.

Safety warning notice

WARNING! To reduce the possibility of heat-related injuries or of overheating the device, do not place

the device directly on your lap or obstruct the device air vents. Use the device only on a hard, flat surface. Do not allow another hard surface, such as an adjoining optional printer, or a soft surface, such as pillows or rugs or clothing, to block airflow. Also, do not allow the AC adapter to contact the skin or a soft surface, such as pillows or rugs or clothing, during operation. The device and the AC adapter comply with the user-accessible surface temperature limits de ned by the International Standard for Safety of Information Technology Equipment (IEC 60950-1).

iii

iv Safety warning notice

Table of contents

1 Product features ...........................................................................................................................................	1
Standard con guration features ...........................................................................................................................	1
Front panel components ........................................................................................................................................	2
Rear panel components .........................................................................................................................................	3
Serial number location ..........................................................................................................................................	4
2 Illustrated parts catalog ................................................................................................................................	5
TWR chassis spare parts ........................................................................................................................................	5
Computer major components .............................................................................................................	5
Miscellaneous parts .............................................................................................................................	7
Boards, cards, and ports .....................................................................................................................	8
Cables and adapters ............................................................................................................................	9
Drives .................................................................................................................................................	10
3 Routine care, SATA drive guidelines, and disassembly preparation ..................................................................	11
Electrostatic discharge information ....................................................................................................................	11
Generating static ...............................................................................................................................	11
Preventing electrostatic damage to equipment ...............................................................................	12
Personal grounding methods and equipment ..................................................................................	12
Grounding the work area ...................................................................................................................	12
Recommended materials and equipment ........................................................................................	13
Operating guidelines ...........................................................................................................................................	13
Routine care .........................................................................................................................................................	14
General cleaning safety precautions ................................................................................................	14
Cleaning the Computer Case .............................................................................................................	14
Cleaning the keyboard .......................................................................................................................	14
Cleaning the monitor .........................................................................................................................	15
Cleaning the mouse ...........................................................................................................................	15
Service considerations .........................................................................................................................................	15
Power supply fan ...............................................................................................................................	15
Tools and software Requirements ....................................................................................................	15
Screws ...............................................................................................................................................	16
Cables and connectors ......................................................................................................................	16
Hard Drives ........................................................................................................................................	16
Lithium coin cell battery ....................................................................................................................	16
SATA hard drives ..................................................................................................................................................	17

v

SATA hard drive cables .........................................................................................................................................	17
SATA data cable .................................................................................................................................	17
SMART ATA drives ................................................................................................................................................	17
Cable management ..............................................................................................................................................	18
4 Removal and replacement procedures – Microtower (MT) chassis ....................................................................	19
Preparation for disassembly ...............................................................................................................................	19
Access panel .........................................................................................................................................................	20
Front bezel ...........................................................................................................................................................	21
Front bezel security .............................................................................................................................................	22
Removing bezel blanks ........................................................................................................................................	23
Optional front bezel dust lter ............................................................................................................................	24
Memory ................................................................................................................................................................	25
Populating DIMM sockets ..................................................................................................................	25
Removing and installing DIMMs ........................................................................................................	26
Drive cage ............................................................................................................................................................	28
Expansion cards ...................................................................................................................................................	30
Drives ...................................................................................................................................................................	35
Drive positions ...................................................................................................................................	36
System board connections ................................................................................................................	37
Installing and removing drives ..........................................................................................................	38
Removing a 5.25-inch drive ............................................................................................	38
Installing a 5.25-inch drive .............................................................................................	39
Removing a 9.5 mm slim optical drive ...........................................................................	41
Installing a 9.5 mm slim optical drive ............................................................................	42
Installing a 9.5 mm slim optical drive ............................................................................	43
Removing a 3.5-inch hard drive ......................................................................................	45
Installing a 3.5-inch hard drive .......................................................................................	46
Removing a 2.5-inch hard drive ......................................................................................	50
Installing a 2.5-inch hard drive .......................................................................................	51
Removing and installing an M.2 SSD storage card .........................................................	52
WLAN module ......................................................................................................................................................	54
Front I/O and power switch assembly .................................................................................................................	55
Fan sink ................................................................................................................................................................	57
Processor .............................................................................................................................................................	59
Speaker ................................................................................................................................................................	60
Rear fan ................................................................................................................................................................	61
Hood lock (solenoid) ............................................................................................................................................	62
Hood sensor .........................................................................................................................................................	63
Power supply .......................................................................................................................................................	64
Option board ........................................................................................................................................................	67

vi

Antennas ..............................................................................................................................................................	68
System board .......................................................................................................................................................	72
System board callouts .......................................................................................................................	73
5 Computer Setup (F10) Utility ........................................................................................................................	75
Computer Setup (F10) Utilities ............................................................................................................................	75
Using Computer Setup (F10) Utilities ................................................................................................	75
Computer Setup–Main .......................................................................................................................	77
Computer Setup—Security ...............................................................................................................	79
Computer Setup—Advanced .............................................................................................................	81
Computer Setup—UEFI Drivers .........................................................................................................	86
Recovering the Con guration Settings ...............................................................................................................	86
6 Troubleshooting without diagnostics ............................................................................................................	87
Safety and comfort ..............................................................................................................................................	87
Before you call for technical support ..................................................................................................................	87
Helpful hints ........................................................................................................................................................	88
Solving general problems ....................................................................................................................................	89
Solving power problems ......................................................................................................................................	93
Solving hard drive problems ................................................................................................................................	94
Solving media card reader problems ...................................................................................................................	96
Solving display problems ....................................................................................................................................	97
Solving audio problems .....................................................................................................................................	101
Solving printer problems ...................................................................................................................................	103
Solving keyboard and mouse problems ............................................................................................................	104
Solving Hardware Installation Problems ...........................................................................................................	106
Solving Network Problems ................................................................................................................................	107
Solving memory problems ................................................................................................................................	110
Solving CD-ROM and DVD problems ..................................................................................................................	111
Solving USB flash drive problems .....................................................................................................................	113
Solving front panel component problems ........................................................................................................	115
Solving Internet access problems .....................................................................................................................	115
Solving software problems ...............................................................................................................................	117
7 POST error messages and diagnostic front panel LEDs and audible codes .......................................................	118
POST numeric codes and text messages ..........................................................................................................	118
Interpreting system validation diagnostic front panel LEDs and audible codes ..............................................	123
8 Password security and resetting CMOS ........................................................................................................	125
Resetting the password jumper ........................................................................................................................	125

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Clearing and resetting the BIOS ........................................................................................................................	127
9 Using HP PC Hardware Diagnostics (UEFI) .....................................................................................................	128
Downloading HP PC Hardware Diagnostics (UEFI) to a USB device ..................................................................	128
10 Backing up, restoring, and recovering ........................................................................................................	130
Backing up, restoring, and recovering in Windows 10 ......................................................................................	130
Creating recovery media and backups ............................................................................................	130
Creating HP Recovery media (select products only) ....................................................	130
Using Windows tools .......................................................................................................................	131
Restore and recovery ......................................................................................................................	132
Recovering using HP Recovery Manager ......................................................................	132
What you need to know before you get started ........................................	132
Using the HP Recovery partition (select products only) ............................	133
Using HP Recovery media to recover .........................................................	133
Changing the computer boot order ............................................................	134
Removing the HP Recovery partition (select products only) .....................	135
Backing up, restoring, and recovering in Windows 7 ........................................................................................	135
Creating recovery media and backups ............................................................................................	135
Guidelines .....................................................................................................................	136
Creating recovery media with HP Recovery Disc Creator .............................................	136
Creating recovery media ............................................................................	136
Backing up your information ........................................................................................	136
Performing a system recovery ........................................................................................................	137
Using the Windows recovery tools ...............................................................................	137
Using f11 recovery tools (select products only) ..........................................................	138
Using Windows 7 operating system media ..................................................................	139
Appendix A Battery replacement ...................................................................................................................	140
Appendix B Power Cord Set Requirements ......................................................................................................	143
General Requirements .......................................................................................................................................	143
Japanese Power Cord Requirements .................................................................................................................	143
Country-Speci c Requirements ........................................................................................................................	144
Appendix C Statement of memory volatility ...................................................................................................	145
Nonvolatile memory usage ...............................................................................................................................	147
Questions and answers .....................................................................................................................................	149
Using HP Sure Start (select models only) ..........................................................................................................	150

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Appendix D peci c tions .............................................................................................................................	151
TWR Speci cations ............................................................................................................................................	151
Index ...........................................................................................................................................................	153

ix

x

1Product features

Standard con gur tion 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.

Standard con guration features

1

Front panel components

Drive con guration may vary by model. Some models have a bezel blank covering one or more drive bays.

Front panel components

1	5.25-inch half-height drive bay (behind bezel)	7	Audio-out (headphone) jack
2	Slim optical drive (optional)	8	USB 2.0 port with HP Sleep and Charge
3	SD card reader (optional)	9	USB 2.0 port
4	Power button	10	USB 3.x ports (2)
5	Hard drive activity light	11	USB Type-C charging port

6Audio-out (headphone)/Audio-in (microphone) combo jack

NOTE: The light on the power button is normally white when the power is on. If it is flashing red, there is a problem with the computer and it is displaying a diagnostic code. Refer to the Maintenance and Service Guide to interpret the code.

2Chapter 1 Product features

Rear panel components

Rear panel components

1	Audio-out jack for powered audio devices	6	Audio-in jack
2	DisplayPort monitor connectors (2)	7	RJ-45 (network) jack
3	Optional port (DisplayPort, HDMI, VGA or USB-C)	8	Optional serial port
	(USB-C option has alt mode DisplayPort or 15W
	output)
4	USB 2.0 ports with wake from S4/S5 (2)	9	Power cord connector
5	USB 3.x ports (4)
NOTE:	Your model may have additional optional ports available from HP.

When a device is plugged into either audio jack, a dialog box will appear on the monitor screen asking if you want to use the jack for a microphone or a headphone. You can also recon gure the jacks 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/or the integrated graphics on the system board may be used. The speci c graphics card installed and software con guration 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.

4Chapter 1 Product features

2Illustrated parts catalog

TWR 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.

Item Description

(1)Front bezel

HP EliteDesk 800 G3 models HP EliteDesk 880 G3 models

(2)Access panel

(3)System board (includes replacement thermal material)

(4)Fan sink (includes replacement thermal material)

95 W

65 W

(5)Power supply

500W, 90% efficient

TWR chassis spare parts 5

Item Description

250W, 92% efficient

250W, 85% efficient (800 models)

250W, 85% efficient (880 models)

*Memory modules (PC4-2400) 16-GB

8-GB

4-GB

2-GB

*Processors (include replacement thermal material; not illustrated)) Intel Core i7-7700 processor

Intel Core i7-7700K processor Intel Core i5-7600 processor Intel Core i5-7500 processor Intel Core i3-7320 processor Intel Core i3-7300 processor Intel Core i3-7100 processor Intel Core i7-6700 processor Intel Core i5-6600 processor Intel Core i5-6500 processor Intel Core i3-6100 processor Intel Pentium G4620 processor Intel Pentium G4600 processor Intel Pentium G4560 processor Intel Celeron G3950 processor Intel Celeron G3930 processor

6Chapter 2 Illustrated parts catalog

Miscellaneous parts

Item Description

(1)Front I/O assembly

(2)Fan

(3)Hood sensor

(4)Hood lock

(5)Speaker

*Secure Digital (SD) card reader

*Optical drive latch

*	Bezel dust lter

*Bezel blank, main

*Bezel blank, slim optical drive

*Rubber feet

*Hard drive grommet

*Mouse

PS2, optical USB, laser USB, optical

USB, antimicrobial USB, washable

TWR chassis spare parts 7

Item Description

USB, hardened

USB, grey

*Keyboards

PS/2 slim USB grey USB slim

Wireless keyboard, mouse, and dongle

Boards, cards, and ports

Description

Graphics cards:

Nvidia GeForce GT730 2 GB PCIe x8

Nvidia GeForce GT720 1 GB PCIe x8

AMD Radeon™ RX 480 2 GB FH PCIe x16

AMD Radeon RX 460 2 GB FH PCIe x16

AMD Radeon R7 450 4 GB FH PCIe x16 G5

Nvidia GTX 1080 8 GB FH PCIe x16

Graphics card holder bracket

WLAN modules

Intel 8265 802.11AC 2x2 Wi-Fi +Bluetooth M.2 Combo Card non-VPro

Intel 7265 802.11AC 2x2 Wi-Fi +Bluetooth M.2 Combo Card non-VPro

Intel 3168 802.11AC 2x2 Wi-Fi +Bluetooth M.2 Combo Card non-VPro

Option boards:

HDMI option board

DisplayPort option board

USB 3.1 Type C option board

VGA option board

Serial port

Serial/PS2 port

RS-232 module

RS-232 to PS2 module

Printer port, PCIe card

USB 3.1 Type-C connector, PCIe card

8Chapter 2 Illustrated parts catalog

Cables and adapters

Item Description

(1)SATA drive power cable

(2)SATA data cable, 6 inch, 2 straight ends

*SATA data cable (RF solution), 6 inch, 2 straight ends

(3)SATA data cable, 6 inch, 1 straight end, 1 angled end

*SATA data cable (RF solution), 6 inch, 1 straight end, 1 angled end

*SATA data cable, 14 inch, 1 straight end, 1 angled end

*SATA data cable (RF solution), 14 inch, 1 straight end, 1 angled end

*SATA data cable, 15 inch, 1 straight end, 1 angled end

*SATA data cable (RF solution), 15 inch, 1 straight end, 1 angled end

*Serial port cable

*Serial/PS2 port cable

*DisplayPort cable, 1.8 m

*DVI to DVI cable

*Internal antennas

*Antenna cover

*Adapters

DisplayPort to HDMI 1.4 DisplayPort to VGA

TWR chassis spare parts 9

Item Description

DisplayPort to DVI

USB-C to USB 3.0

USB 3.1 Type-C to DisplayPort

Drives

Description

Hard drives

2-TB, 7200-rpm, 3.5-inch

1-TB, 7200-rpm, 3.5-inch

1-TB, 7200-rpm, 2.5-inch

1-TB, 7200-rpm,. hybrid SSD, 3.5-inch

1-TB, 5400-rpm,. hybrid SSD, 3.5-inch

500 GB, 7200 rpm, 3.5-inch

500 GB, 7200 rpm, 7 mm

500-GB, 7200-rpm, OPAL2, self-encrypting drive (SED)

500-GB, 5400-rpm, FIPS

500-GB, 5400-rpm, hybrid SSD

Solid-state drives, 2280, 2.5-inch

512-GB, FIPS-140-2

256-GB, FIPS-140-2

256-GB

128-GB

Solid-state drives, 2280, NVMe, M.2

1 TB, TLC

512-GB, MLC

512-GB, TLC

256-GB, MLC

256-GB, TLC

256-GB, PCIe

Optical drives, 9.5 mm

DVD±RW drive

DVD-ROM drive

10 Chapter 2 Illustrated parts catalog

3Routine 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 a ected 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:

● Di erent activities generate di erent amounts of static electricity.

●Static electricity increases as humidity decreases.

	Relative Humidity
Event	55%	40%	10%
Walking across carpet	7,500 V	15,000 V	35,000 V
Walking across vinyl floor	3,000 V	5,000 V	12,000 V
Motions of bench worker	400 V	800 V	6,000 V
Removing DIPs from plastic tube	400 V	700 V	2,000 V
Removing DIPs from vinyl tray	2,000 V	4,000 V	11,500 V
Removing DIPs from Styrofoam	3,500 V	5,000 V	14,500 V
Removing bubble pack from PCB	7,000 V	20,000 V	26,500 V
Packing PCBs in foam-lined box	5,000 V	11,000 V	21,000 V

These are then multi-packaged inside plastic tubes, trays, or Styrofoam.

NOTE: 700 volts can degrade a product.

Electrostatic discharge information 11

Preventing electrostatic damage to equipment

Many electronic components are sensitive to ESD. Circuitry design and structure determine the degree of sensitivity. The following packaging and grounding precautions are necessary to prevent damage to electric components and accessories.

●To avoid hand contact, transport products in static-safe containers such as tubes, bags, or boxes.

●Protect all electrostatic parts and assemblies with conductive or approved containers or packaging.

●Keep electrostatic sensitive parts in their containers until they arrive at static-free stations.

●Place items on a grounded surface before removing them from their container.

●Always be properly grounded when touching a sensitive component or assembly.

●Avoid contact with pins, leads, or circuitry.

●Place reusable electrostatic-sensitive parts from assemblies in protective packaging or conductive foam.

Personal grounding methods and equipment

Use the following equipment to prevent static electricity damage to equipment:

●Wrist straps are flexible straps with a maximum of one-megohm ± 10% resistance in the ground cords. To provide proper ground, a strap must be worn snug against bare skin. The ground cord must be

connected and 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 floors or dissipative floor mats, use them on both feet with a maximum of one-megohm ± 10% resistance between the operator and ground.

Static Shielding Protection Levels

Method	Voltage
Antistatic plastic	1,500
Carbon-loaded plastic	7,500
Metallized laminate	15,000

Grounding the work area

To prevent static damage at the work area, use the following precautions:

●Cover the work surface with approved static-dissipative material. Provide a wrist strap connected to the work surface and properly grounded tools and equipment.

●Use static-dissipative mats, foot straps, or air ionizers to give added protection.

●Handle electrostatic sensitive components, parts, and assemblies by the case or PCB laminate. Handle them only at static-free work areas.

●Turn o power and input signals before inserting and removing connectors or test equipment.

● 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.

12 Chapter 3 Routine care, SATA drive guidelines, and disassembly preparation

Recommended materials and equipment

Materials and equipment that are recommended for use in preventing static electricity include:

●Antistatic tape

●Antistatic smocks, aprons, or sleeve protectors

●Conductive bins and other assembly or soldering aids

●Conductive foam

●Conductive tabletop workstations with ground cord of one-megohm +/- 10% resistance

●Static-dissipative table or floor mats with hard tie to ground

●Field service kits

●Static awareness labels

●Wrist straps and footwear straps providing one-megohm +/- 10% resistance

●Material handling packages

●Conductive plastic bags

●Conductive plastic tubes

●Conductive tote boxes

●Opaque shielding bags

●Transparent metallized shielding bags

●Transparent shielding tubes

Operating guidelines

To prevent overheating and to help prolong the life of the computer:

●Keep the computer away from excessive moisture, direct sunlight, and extremes of heat and cold.

●Operate the computer on a sturdy, level surface. Leave a 10.2-cm (4-inch) clearance on all vented sides of the computer and above the monitor to permit the required airflow.

●Never restrict the airflow into the computer by blocking any vents or air intakes. Do not place the keyboard, with the keyboard feet down, directly against the front of the desktop unit as this also restricts airflow.

●Occasionally clean the air vents on all vented sides of the computer. Lint, dust, and other foreign matter can block the vents and limit the airflow. Be sure to unplug the computer before cleaning the air vents.

●Never operate the computer with the cover or side panel removed.

●Do not stack computers on top of each other or place computers so near each other that they are subject to each other’s re-circulated or preheated air.

●If the computer is to be operated within a separate enclosure, intake and exhaust ventilation must be provided on the enclosure, and the same operating guidelines listed above will still apply.

●Keep liquids away from the computer and keyboard.

Operating guidelines 13

●Never cover the ventilation slots on the monitor with any type of material.

●Install or enable power management functions of the operating system or other software, including sleep states.

Routine care

General cleaning safety precautions

1.Never use solvents or flammable solutions to clean the computer.

2.Never immerse any parts in water or cleaning solutions; apply any liquids to a clean cloth and then use the cloth on the component.

3.Always unplug the computer when cleaning with liquids or damp cloths.

4.Always unplug the computer before cleaning the keyboard, mouse, or air vents.

5.Disconnect the keyboard before cleaning it.

6.Wear safety glasses equipped with side shields when cleaning the keyboard.

Cleaning the Computer Case

Follow all safety precautions in General cleaning safety precautions on page 14 before cleaning the computer.

To clean the computer case, follow the procedures described below:

●To remove light stains or dirt, use plain water with a clean, lint-free cloth or swab.

●For stronger stains, use a mild dishwashing liquid diluted with water. Rinse well by wiping it with a cloth or swab dampened with clear water.

●For stubborn stains, use isopropyl (rubbing) alcohol. No rinsing is needed as the alcohol will evaporate quickly and not leave a residue.

●After cleaning, always wipe the unit with a clean, lint-free cloth.

●Occasionally clean the air vents on the computer. Lint and other foreign matter can block the vents and limit the airflow.

Cleaning the keyboard

Follow all safety precautions in General cleaning safety precautions on page 14 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 14.

When cleaning debris from under the keys, review all rules in General cleaning safety precautions on page 14 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.

14 Chapter 3 Routine care, SATA drive guidelines, and disassembly preparation

●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 con ned areas. Allow the parts to air dry before reassembly.

Cleaning the monitor

●Wipe the monitor screen with a clean cloth moistened with water or with a towelette designed for cleaning monitors. Do not use sprays or aerosols directly on the screen; the liquid may seep into the housing and damage a component. Never use solvents or flammable liquids on the monitor.

●To clean the monitor body follow the procedures in Cleaning the Computer Case on page 14.

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 14.

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 “ ” 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

Service considerations

15

Screws

The screws used in the computer are not interchangeable. They may have standard or metric threads and may be of di erent 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 flat, flexible cables. These cables must be handled with care to avoid damage. Apply only the tension required to seat or unseat the cables during insertion or removal from the connector. Handle cables by the connector whenever possible. In all cases, avoid bending or twisting the cables, and ensure that the cables are routed in such a way that they cannot be caught or snagged by parts being removed or replaced.

CAUTION: When servicing this computer, ensure that cables are placed in their proper location during the reassembly process. Improper cable placement can damage the computer.

Hard Drives

Handle hard drives as delicate, precision components, avoiding all physical shock and vibration. This applies to failed drives as well as replacement spares.

●If a drive must be mailed, place the drive in a bubble-pack mailer or other suitable protective packaging and label the package “Fragile: Handle With Care.”

●Do not remove hard drives from the shipping package for storage. Keep hard drives in their protective packaging until they are actually mounted in the computer.

●Avoid dropping drives from any height onto any surface.

●	If you are inserting or removing a hard drive, turn 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.

16 Chapter 3 Routine care, SATA drive guidelines, and disassembly preparation

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 di erential	400-700 mV
Drive voltages	3.3 V, 5 V, 12 V
Jumpers for con guring drive	N/A
Data transfer rate	6.0 Gb/s

SATA hard drive cables

SATA data cable

Always use an HP approved SATA 6.0 Gb/s cable as it is fully backwards compatible with the SATA 1.5 Gb/s drives.

Current HP desktop products ship with SATA 6.0 Gb/s hard drives.

SATA data cables are susceptible to damage if overflexed. Never crease a SATA data cable and never bend it tighter than a 30 mm (1.18 in) radius.

The SATA data cable is a thin, 7-pin cable designed to transmit data for only a single drive.

SMART ATA drives

The Self Monitoring Analysis and Recording Technology (SMART) ATA drives for the HP Personal Computers have built-in drive failure prediction that warns the user or network administrator of an impending failure or crash of the hard drive. The SMART drive tracks fault prediction and failure indication parameters such as reallocated sector count, spin retry count, and calibration retry count. If the drive determines that a failure is imminent, it generates a fault alert.

SATA hard drives 17

Cable management

Always follow good cable management practices when working inside the computer.

●Keep cables away from major heat sources like the heat sink.

●Do not jam cables on top of expansion cards or memory modules. Printed circuit cards like these are not designed to take excessive pressure on them.

●Keep cables clear of sliding or moveable parts to prevent them from being cut or crimped when the parts are moved.

●When folding a flat ribbon cable, never fold to a sharp crease. Sharp creases may damage the wires.

●Some flat ribbon cables come prefolded. Never change the folds on these cables.

●Do not bend any cable sharply. A sharp bend can break the internal wires.

●Never bend a SATA data cable tighter than a 30 mm (1.18 in) radius.

●Never crease a SATA data cable.

●Do not rely on components like the drive cage, power supply, or computer cover to push cables down into the chassis. Always position the cables to lay properly by themselves.

18 Chapter 3 Routine care, SATA drive guidelines, and disassembly preparation

4Removal 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 11 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 di erent thread sizes and lengths; using the wrong screw in an application may damage the unit.

Preparation for disassembly 19

Access panel

To access internal components, you must remove the access panel:

1.Prepare the computer for disassembly (Preparation for disassembly on page 19)

2.Slide the access panel release lever to the left (1) so that it locks into place. Then slide the access panel

back (2) and lift it o the computer (3).

To replace the access panel, reverse the disassembly procedures.

20 Chapter 4 Removal and replacement procedures – Microtower (MT) chassis