HP 280 G1 Microtower Business Maintenance and Service Guide

Maintenance and Service Guide

HP 280 G1 Microtower Business Desktop PC

Intel and Pentium are trademarks of Intel Corporation in the U.S. and other countries. Bluetooth is a trademark owned by its proprietor and used by Hewlett-Packard Company under license. Microsoft, Windows, WIndows 7, and Windows 8.1 are U.S. registered trademarks of the Microsoft group of companies. SD Logo is a trademark of its proprietor.

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.

This document contains proprietary information that is protected by copyright. No part of this document may be photocopied, reproduced, or translated to another language without the prior written consent of HewlettPackard Company.

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 on all editions of Windows 8.1. This computer may require upgraded and/or separately purchased hardware, drivers, and/or software to take full advantage of Windows 8.1 functionality. See

http://www.microsoft.com for details.

This computer may require upgraded and/ or separately purchased hardware and/or a DVD drive to install the Windows 7 software and take full advantage of Windows 7 functionality. See http://windows.microsoft.com/en-us/

windows7/get-know-windows-7 for details.

First Edition: September 2014

Document Part Number: 792382-001

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 useraccessible surface temperature limits defined by the International Standard for Safety of Information Technology Equipment (IEC 60950).

iii

iv Safety warning notice

Table of contents

1 Product description ....................................................................................................................................... 1

2 Product Features ........................................................................................................................................... 4

Standard Configuration Features .......................................................................................................................... 4

Front panel components ....................................................................................................................................... 5

Rear panel components ......................................................................................................................................... 6

Serial Number Location ......................................................................................................................................... 8

3 Illustrated parts catalog ................................................................................................................................ 9

Computer major components ................................................................................................................................ 9

Misc parts ............................................................................................................................................................. 11

Drives ................................................................................................................................................................... 12

4 Routine care, SATA drive guidelines, and disassembly preparation .................................................................. 13

Electrostatic discharge information ................................................................................................................... 13

Generating static ............................................................................................................................... 13

Preventing electrostatic damage to equipment .............................................................................. 14

Personal grounding methods and equipment .................................................................................. 14

Grounding the work area .................................................................................................................. 14

Recommended materials and equipment ........................................................................................ 15

Operating guidelines ........................................................................................................................................... 15

Routine care ......................................................................................................................................................... 16

General cleaning safety precautions ................................................................................................ 16

Cleaning the Computer Case ............................................................................................................. 16

Cleaning the keyboard ...................................................................................................................... 16

Cleaning the monitor ......................................................................................................................... 17

Cleaning the mouse ........................................................................................................................... 17

Service considerations ........................................................................................................................................ 17

Power supply fan ............................................................................................................................... 17

Tools and software Requirements ................................................................................................... 17

Screws ............................................................................................................................................... 18

Cables and connectors ...................................................................................................................... 18

Hard Drives ........................................................................................................................................ 18

Lithium coin cell battery ................................................................................................................... 18

SATA hard drives .................................................................................................................................................. 19

SATA hard drive cables ........................................................................................................................................ 19

SATA data cable ................................................................................................................................. 19

SMART ATA drives ................................................................................................................................................ 19

Cable management .............................................................................................................................................. 20

5 Removal and replacement procedures ........................................................................................................... 21

Preparation for disassembly ............................................................................................................................... 21

Access panel ........................................................................................................................................................ 22

Front bezel ........................................................................................................................................................... 23

Optical drive bezel blank ..................................................................................................................................... 24

Memory ................................................................................................................................................................ 25

DIMMs ................................................................................................................................................ 25

DDR3/DDR3L-SDRAM UDIMMs .......................................................................................................... 25

Populating DIMM sockets .................................................................................................................. 25

Installing DIMMs ................................................................................................................................ 26

Expansion cards ................................................................................................................................................... 27

Drives ................................................................................................................................................................... 30

Drive positions ................................................................................................................................... 31

Removing an optical drive ................................................................................................................ 32

Removing a hard drive ...................................................................................................................... 33

Front I/O and power switch assembly ................................................................................................................. 34

Card reader .......................................................................................................................................................... 37

Heat sink .............................................................................................................................................................. 39

Processor ............................................................................................................................................................. 40

Speaker ................................................................................................................................................................ 41

Rear chassis fan ................................................................................................................................................... 44

Hood sensor ......................................................................................................................................................... 46

Power supply ....................................................................................................................................................... 47

System board ....................................................................................................................................................... 49

System board callouts ...................................................................................................................... 50

6 Computer Setup (F10) Utility ........................................................................................................................ 51

Computer Setup (F10) Utilities ............................................................................................................................ 51

Using Computer Setup (F10) Utilities ............................................................................................... 52

Computer Setup—File ...................................................................................................................... 53

Computer Setup—Storage ............................................................................................................... 54

Computer Setup—Security ............................................................................................................... 55

Computer Setup—Power .................................................................................................................. 58

Computer Setup—Advanced ............................................................................................................ 59

Recovering the Configuration Settings ............................................................................................................... 61

7 Troubleshooting without diagnostics ............................................................................................................ 62

Safety and comfort .............................................................................................................................................. 62

Before you call for technical support .................................................................................................................. 62

Helpful hints ........................................................................................................................................................ 63

Solving general problems ................................................................................................................................... 64

Solving power problems ...................................................................................................................................... 68

Solving hard drive problems ............................................................................................................................... 69

Solving media card reader problems .................................................................................................................. 71

Solving display problems .................................................................................................................................... 72

Solving audio problems ....................................................................................................................................... 76

Solving printer problems ..................................................................................................................................... 78

Solving keyboard and mouse problems ............................................................................................................. 79

Solving Hardware Installation Problems ............................................................................................................ 81

Solving Network Problems .................................................................................................................................. 83

Solving memory problems .................................................................................................................................. 86

Solving CD-ROM and DVD problems .................................................................................................................... 88

Solving USB flash drive problems ....................................................................................................................... 90

Solving front panel component problems .......................................................................................................... 91

Solving Internet access problems ....................................................................................................................... 91

Solving software problems ................................................................................................................................. 92

8 POST error messages ................................................................................................................................... 94

POST numeric codes and text messages ............................................................................................................ 94

Interpreting POST diagnostic front panel LEDs and audible codes .................................................................. 100

9 Password security and resetting CMOS ........................................................................................................ 103

Resetting the CMOS and password jumper ....................................................................................................... 103

Changing a Setup or Power-On password ........................................................................................................ 104

Deleting a Setup or Power-On password .......................................................................................................... 105

10 HP PC Hardware Diagnostics ..................................................................................................................... 106

Why run HP PC Hardware Diagnostics .............................................................................................................. 106

How to access and run HP PC Hardware Diagnostics ....................................................................................... 106

Downloading HP PC Hardware Diagnostics (UEFI) to a USB device .................................................................. 106

11 System backup and recovery .................................................................................................................... 108

Backing up, restoring, and recovering in Windows 8.1 or Windows 8 ............................................................. 108

Creating recovery media and backups ........................................................................................... 108

Restoring and recovering using Windows tools ............................................................................. 108

Using Reset when the system is not responding ......................................................... 109

vii

Recovery using the Windows recovery USB flash drive ............................................... 109

Recovery using Windows operating system media (purchased separately) .............. 110

Backing up, restoring, and recovering in Windows 7 ........................................................................................ 110

Creating recovery media ................................................................................................................. 111

Creating recovery media using HP Recovery Manager (select models only) .............. 111

Creating recovery discs with HP Recovery Disc Creator (select models only) ............ 112

Creating recovery discs .............................................................................. 112

Backing up your information ........................................................................................ 113

System Restore ............................................................................................................................... 113

System Recovery ............................................................................................................................. 114

System Recovery when Windows is responding .......................................................... 114

System Recovery when Windows is not responding ................................................... 115

System Recovery using recovery media (select models only) .................................... 115

Using HP Recovery Disc operating system discs (select models only) ....................... 116

Appendix A Battery replacement ................................................................................................................... 118

Appendix B Power Cord Set Requirements ...................................................................................................... 120

General Requirements ....................................................................................................................................... 120

Japanese Power Cord Requirements ................................................................................................................ 120

Country-Specific Requirements ........................................................................................................................ 121

Appendix C Statement of Volatility ................................................................................................................ 122

Appendix D Specifications ............................................................................................................................. 124

Specifications .................................................................................................................................................... 124

Appendix E Recycling .................................................................................................................................... 125

Index ........................................................................................................................................................... 126

viii

1 Product description

Category Description

Product Name HP 280 G1 Microtower Business Desktop PC

Processors Intel i3-4150 (3.5 GHz, 54W; Intel HD Graphics 4400)

Intel Pentium G3250 (3.2 GHz, 53W; Intel HD Graphics)

Intel Celeron G1840 (2.8 GHz, 53W; Intel HD Graphics)

Chipset Intel H81

Graphics Internal graphics:

Intel Integrated HD Graphics Varies by Processor

External graphics:

NVIDIA GeForce 705 1GB DDR3 FH GFX 30W

Memory Two customer-accessible/upgradable memory module slots (UDIMM)

Supports dual channel memory

Supports up to 8 GB max system memory (DDR3-1600MHz module)

Supports the following system RAM configurations:

●

8192 MB (4096 MB×2)

●

6144 MB (4096 MB×1 + 2048 MB×1)

●

4096 MB (4096 MB×1)

●

2048 MB (2048 MB×1)

Hard drive Supports SATA, 3.5-in, 6 Gb/s hard drives

●

1 TB, 7200 rpm

●

500 GB, 7200 rpm

Optical drive Supports half-height, 5.25-inch SATA optical drives

●

DVD±RW Double-Layer SuperMulti Drive

●

DVD-ROM drive

Supports no optical drive option

Audio Integrated hi-definition audio

Standard internal business PC speaker

Internal amplifier

Ethernet Integrated 10/100/1000M GbE NIC

Wireless HP WLAN 802.11 a/g/n 2x2 DB PCIe x1 Card

Internal expansion (1) 1st 3.5-inch hard drive bay

(1) 2nd 3.5-inch hard drive bay

(1) 5.25-inch optical drive bay

Category Description

(1) PCIe x 16

(1) PCIe x 1

(1) PCI 2.1

External media cards HP Multi-Format Memory Card Reader slot, 6-in-1

Ports Rear I/O

(4) USB 2.0

(2) USB 3.0

(1) Audio line out

(1) Audio line in

(1) RJ-45

(1) VGA

(1) DVI-D

(2) PS/2 standard

(2) Serial port

(1) Parallel port

Front I/O

(2) USB 2.0

(1) Headphone out

(1) Microphone in

Keyboard/pointing devices Universal USB Wired Windows 8 Keyboard

HP PS/2 Keyboard

Universal USB Wired Optical Mouse

HP PS/2 Mouse

HP USB Mouse

Power requirements 180W aPFC

180W HE (E-star)

180W standard

NOTE: Processor max at 65W; Memory dual DIMM max at 8GB total (4GB each); Graphics card

max at 45W; PCIe X1 max at 25W; PCI max at 10W; 2 hard drive max at 1 TB each

Operating system Preinstalled:

Windows 8.1 Professional 64 downgrade to Windows 7 Pro 64 Bit

Microsoft Windows 8.1 Professional 64 bit

Microsoft Windows 8.1 Professional for Education 64 bit

Microsoft Windows 8.1 (Emerging Markets) 64 bit

Microsoft Windows 8.1 64 bit

Microsoft Windows 8.1 for China 64 bit

2 Chapter 1 Product description

Microsoft Windows 8.1 Professional downgrade to Windows 7 Professional 32 bit

Category Description

Microsoft Windows 8.1 with Bing 64 bit

Microsoft Windows 8.1 with Bing (Emerging Markets) 64 bit

Microsoft Windows 7 Professional Edition 32 bit

Microsoft Windows 7 Professional (National Academic) 32 bit

Microsoft Windows 7 Professional (National Academic) 64 bit

Ubuntu Linux

FreeDos 2.0

SoftPaq:

Windows 7 driver (64 bit)

Windows 7 driver (32 bit)

Windows 8.1 driver (64 bit)

Serviceability End user replaceable parts:

Memory module

Optical drive

Hard drive

2 Product Features

Standard Configuration 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.

4 Chapter 2 Product Features

Front panel components

Drive configuration may vary by model. Some models have a bezel blank covering the optical drive bay.

1 Half-height Bay - supporting an optical disk drive

(optional)

2 Dual-State Power Button 6 3.5 mm Headphone Output

3 PC Status LED 7 6-in-1 Media Card Reader (optional)

4 (2) USB 2.0 Ports

NOTE: When a device is plugged into the microphone or headphone connector, a dialog box will pop up asking if you want

to use the connector for a microphone Line-In device or a headphone. You can reconfigure the connector at any time by double-clicking the Audio Manager icon in the Windows taskbar.

NOTE: The Power On Light is normally white when the power is on. If it is flashing red, there is a problem with the

computer and it is displaying a diagnostic code.

5 3.5 mm Microphone Jack

Front panel components 5

Rear panel components

Models with different sets of I/O options are available, as shown in the following images.

1 Power cord connector 6 (2) USB 3.0 ports (left); (2) USB 2.0 ports

2 Serial port (optional) 7 VGA connector

3 Parallel port (optional) 8 DVI-D connector

4 Audio line in 9 (2) USB 2.0 ports

5 Audio line out 10 RJ-45 network connector

NOTE: When a device is plugged into the blue Line-In Audio Connector, a dialog box will pop up asking if

you want to use the connector for a line-in device or a microphone. You can reconfigure the connector at any time by double-clicking the Audio Manager icon in the Windows taskbar.

When a graphics card is installed in one of the system board slots, the video connectors on the graphics card and/or the integrated graphics on the system board may be used. The specific graphics card installed and software configuration will determine the behavior.

The system board graphics can be disabled by changing settings in Computer Setup.

6 Chapter 2 Product Features

1 Power cord connector 7 VGA connector

2 Serial port (optional) 8 Serial port

3 Printer port (optional) 9 DVI-D connector

4 Audio line in 10 PS/2 keyboard and mouse connectors

5 Audio line out 11 (2) USB 2.0 ports

6 (2) USB 3.0 ports (left); (2) USB 2.0 ports 12 RJ-45 network connector

NOTE: When a device is plugged into the blue Line-In Audio Connector, a dialog box will pop up asking if

you want to use the connector for a line-in device or a microphone. You can reconfigure the connector at any time by double-clicking the Audio Manager icon in the Windows taskbar.

The system board graphics can be disabled by changing settings in Computer Setup.

Rear panel components 7

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.

8 Chapter 2 Product Features

3 Illustrated parts catalog

Computer major components

Computer major components 9

Item Description

(1) Front bezel

* Bezel blank (optical drive)

(2) Access panel

(3) Power supply

180W, APFC

180W, Estar6

180W, standard

(4) System board (includes replacement thermal material)

For use in models without Windows 8.1

For use in models with Windows 8.1 Standard

For use in models with Windows 8.1 Professional

For use in NetClone models (for use only in China)

(5) Front I/O assembly

(6) Memory modules (PC3L-12800, 1600-MHz)

4-GB

2-GB

(7) Processors (include replacement thermal material)

Intel Core i3-4150 processor, 3.5 GHz

Intel Pentium G3250 processor, 3.2 GHz

Intel Celeron G1840 processor, 2.8 GHz

*not illustrated

10 Chapter 3 Illustrated parts catalog

Misc parts

Item Description

(1) Fan sink (includes replacement thermal material)

(2) Speaker

(3) 6-in-1 card reader

(4) Fan

(5) Graphics card, GeForce GT705 PCIe x16, 1 GB

WLAN module

(6) WLAN 802.11 a/b/g/n + Bluetooth 4.0 module

Misc parts 11

Item Description

* WLAN/Bluetooth caddy card

* Printer port kit

* Serial port kit

* Hood sensor

* SATA data cable, 10 inch

* Rubber foot kit

* Antenna (for use with 802.11 WLAN module)

* Mouse

HP, PS2, optical

USB, unbranded

HP, USB, optical

* Keyboards

PS/2

USB, HP

USB, unbranded

Drives

*not illustrated

Description

Hard drives/Solid-state drives

1-TB

500-GB

Optical drives

DVD±RW drive

DVD-ROM drive

12 Chapter 3 Illustrated parts catalog

4 Routine care, SATA drive guidelines, and

disassembly preparation

This chapter provides general service information for the computer. Adherence to the procedures and precautions described in this chapter is essential for proper service.

CAUTION: When the computer is plugged into an AC power source, voltage is always applied to the system

board. You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage.

Electrostatic discharge information

A sudden discharge of static electricity from your finger or other conductor can destroy static-sensitive devices or microcircuitry. Often the spark is neither felt nor heard, but damage occurs. An electronic device exposed to electrostatic discharge (ESD) may not appear to be affected at all and can work perfectly throughout a normal cycle. The device may function normally for a while, but it has been degraded in the internal layers, reducing its life expectancy.

Networks built into many integrated circuits provide some protection, but in many cases, the discharge contains enough power to alter device parameters or melt silicon junctions.

Generating static

The following table shows that:

●

Different activities generate different amounts of static electricity.

●

Static electricity increases as humidity decreases.

Relative Humidity

Event 55% 40% 10%

Walking across carpet

Walking across vinyl floor

Motions of bench worker

Removing DIPs from plastic tube

Removing DIPs from vinyl tray

Removing DIPs from Styrofoam

Removing bubble pack from PCB

Packing PCBs in foam-lined box

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

7,500 V

3,000 V

400 V

2,000 V

3,500 V

7,000 V

5,000 V

15,000 V

5,000 V

800 V

700 V

4,000 V

5,000 V

20,000 V

11,000 V

35,000 V

12,000 V

6,000 V

2,000 V

11,500 V

14,500 V

26,500 V

21,000 V

NOTE: 700 volts can degrade a product.

Electrostatic discharge information 13

Preventing electrostatic damage to equipment

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

●

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

●

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

●

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

●

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

●

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

●

Avoid contact with pins, leads, or circuitry.

●

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

Personal grounding methods and equipment

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

●

Wrist straps are flexible straps with a maximum of one-megohm ± 10% resistance in the ground cords. To provide proper ground, a strap must be worn snug against bare skin. The ground cord must be connected and fit snugly into the banana plug connector on the grounding mat or workstation.

●

Heel straps/Toe straps/Boot straps can be used at standing workstations and are compatible with most types of shoes or boots. On conductive floors or dissipative floor mats, use them on both feet with a maximum of one-megohm ± 10% resistance between the operator and ground.

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 off power and input signals before inserting and removing connectors or test equipment.

Static Shielding Protection Levels

1,500

7,500

15,000

●

Use fixtures made of static-safe materials when fixtures must directly contact dissipative surfaces.

●

Keep work area free of nonconductive materials such as ordinary plastic assembly aids and Styrofoam.

●

Use field service tools, such as cutters, screwdrivers, and vacuums, that are conductive.

14 Chapter 4 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 15

●

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 16 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 16 before cleaning the keyboard.

To clean the tops of the keys or the keyboard body, follow the procedures described in

Computer Case on page 16.

When cleaning debris from under the keys, review all rules in before following these procedures:

CAUTION: Use safety glasses equipped with side shields before attempting to clean debris from under the

keys.

Cleaning the

General cleaning safety precautions on page 16

●

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.

16 Chapter 4 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 fibers or dirt in confined areas. Allow the parts to air dry before reassembly.

Cleaning the monitor

●

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

●

To clean the monitor body follow the procedures in

Cleaning the mouse

Before cleaning the mouse, ensure that the power to the computer is turned off.

●

Clean the mouse ball by first removing the retaining plate and the ball from the housing. Pull out any debris from the ball socket and wipe the ball with a clean, dry cloth before reassembly.

●

To clean the mouse body, follow the procedures in Cleaning the Computer Case on page 16.

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 off when

the computer is in “Standby,” “Suspend,” or “Off” modes.

You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage.

Cleaning the Computer Case on page 16.

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 17

Screws

The screws used in the computer are not interchangeable. They may have standard or metric threads and may be of different lengths. If an incorrect screw is used during the reassembly process, it can damage the unit. HP strongly recommends that all screws removed during disassembly be kept with the part that was removed, then returned to their proper locations.

CAUTION: Metric screws have a black finish. U.S. screws have a silver finish and are used on hard drives

only.

CAUTION: As each subassembly is removed from the computer, it should be placed away from the work

area to prevent damage.

Cables and connectors

Most cables used throughout the unit are flat, flexible cables. These cables must be handled with care to avoid damage. Apply only the tension required to seat or unseat the cables during insertion or removal from the connector. Handle cables by the connector whenever possible. In all cases, avoid bending or twisting the cables, and ensure that the cables are routed in such a way that they cannot be caught or snagged by parts being removed or replaced.

CAUTION: When servicing this computer, ensure that cables are placed in their proper location during the

reassembly process. Improper cable placement can damage the computer.

Hard Drives

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

●

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

●

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

●

Avoid dropping drives from any height onto any surface.

●

If you are inserting or removing a hard drive, turn off the computer. Do not remove a hard drive while the computer is on or in standby mode.

●

Before handling a drive, ensure that you are discharged of static electricity. While handling a drive, avoid touching the connector.

●

Do not use excessive force when inserting a drive.

●

Avoid exposing a hard drive to liquids, temperature extremes, or products that have magnetic fields such as monitors or speakers.

Lithium coin cell battery

The battery that comes with the computer provides power to the real-time clock and has a minimum lifetime of about three years.

See the appropriate removal and replacement chapter for the chassis you are working on in this guide for instructions on the replacement procedures.

WARNING! This computer contains a lithium battery. There is a risk of fire and chemical burn if the battery

is handled improperly. Do not disassemble, crush, puncture, short external contacts, dispose in water or fire, or expose it to temperatures higher than 140ºF (60ºC). Do not attempt to recharge the battery.

18 Chapter 4 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 differential 400-700 mV

Drive voltages 3.3 V, 5 V, 12 V

Jumpers for configuring drive N/A

Data transfer rate 6.0 Gb/s

SATA hard drive cables

SATA data cable

Always use an HP approved SATA 6.0 Gb/s cable as it is fully backwards compatible with the SATA 3.0 Gb/s and 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 19

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.

20 Chapter 4 Routine care, SATA drive guidelines, and disassembly preparation

5 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 13 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 off the computer and any peripheral devices that are connected to it.

CAUTION: Turn off the computer before disconnecting any cables.

Regardless of the power-on state, voltage is always present on the system board as long as the system is plugged into an active AC outlet. In some systems the cooling fan is on even when the computer is in the “Standby,” or “Suspend” modes. The power cord should always be disconnected before servicing a unit.

6. Disconnect the power cord from the electrical outlet and then from the computer.

7. Disconnect all peripheral device cables from the computer.

8. 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 different thread sizes and lengths; using the wrong

screw in an application may damage the unit.

Preparation for disassembly 21

Access panel

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

1. Prepare the computer for disassembly (

2. Loosen the captive screw on the rear of the access panel (1), slide the computer back approximately 12

mm (1/2 inch) (2), and then lift the access panel off the computer.

Preparation for disassembly on page 21)

Reverse this procedure to replace the access panel.

22 Chapter 5 Removal and replacement procedures

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