HP dx2450 User Manual

Service Reference Guide

HP Compaq dx2450 Business PC

© Copyright 2008 Hewlett-Packard
Development Company, L.P. The
information contained herein is subject to
change without notice.

Microsoft and Windows are trademarks of
Microsoft Corporation in the U.S. and other
countries.

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
Hewlett-Packard Company.

Service Reference Guide

Business PCs

First Edition (March 2008)

Document Part Number: 484988-001

Table of contents

1 Installing and Customizing the Software

Installing the Operating System ........................................................................................................... 1

Installing or Upgrading Device Drivers ................................................................................................. 1

HP Backup and Recovery Manager ..................................................................................................... 2

2 Computer Setup (F10) Utility

Computer Setup (F10) Utilities ............................................................................................................. 3

Using Computer Setup (F10) Utilities .................................................................................. 3

Computer Setup—Main ....................................................................................................... 4

Computer Setup—Advanced ............................................................................................... 5

Computer Setup—Power ..................................................................................................... 6

Computer Setup—Boot ........................................................................................................ 7

Computer Setup—Exit ......................................................................................................... 7

Recovering the Configuration Settings ................................................................................................. 8

3 Computer Diagnostic Features

HP Insight Diagnostics ......................................................................................................................... 9

Accessing HP Insight Diagnostics ....................................................................................... 9

Survey Tab ........................................................................................................................ 10

Test Tab ............................................................................................................................. 11

Status Tab ......................................................................................................................... 11

Log Tab .............................................................................................................................. 12

Help Tab ............................................................................................................................ 12

Saving and Printing Information in HP Insight Diagnostics ................................................ 13

Downloading the Latest Version of HP Insight Diagnostics ............................................... 13

Protecting the Software ...................................................................................................................... 13

HP Backup and Recovery Manager ................................................................................................... 14

4 Serial and Parallel ATA Drive Guidelines and Features

SATA Hard Drives .............................................................................................................................. 15

SATA Hard Drive Cables .................................................................................................................... 16

SATA Data Cable .............................................................................................................. 16

SATA Power Cable ............................................................................................................ 16

PATA Device Information ................................................................................................................... 17

ATA SMART Drives ............................................................................................................................ 17

Hard Drive Capacities ........................................................................................................................ 17

5 Identifying the Chassis, Routine Care, and Disassembly Preparation

iii

Chassis Designation ........................................................................................................................... 18

Microtower (MT) ................................................................................................................. 18

Electrostatic Discharge Information .................................................................................................... 19

Generating Static ............................................................................................................... 19

Preventing Electrostatic Damage to Equipment ................................................................ 19

Personal Grounding Methods and Equipment ................................................................... 20

Grounding the Work Area .................................................................................................. 20

Recommended Materials and Equipment .......................................................................... 20

Operating Guidelines .......................................................................................................................... 21

Routine Care ...................................................................................................................................... 22

General Cleaning Safety Precautions ................................................................................ 22

Cleaning the Computer Case ............................................................................................ 22

Cleaning the Keyboard ...................................................................................................... 22

Cleaning the Monitor .......................................................................................................... 23

Cleaning the Mouse ........................................................................................................... 23

Service Considerations ...................................................................................................................... 23

Power Supply Fan ............................................................................................................. 23

Tools and Software Requirements .................................................................................... 23

Screws ............................................................................................................................... 24

Cables and Connectors ..................................................................................................... 24

Hard Drives ........................................................................................................................ 24

Lithium Coin Cell Battery ................................................................................................... 25

6 Removal and Replacement Procedures Microtower (MT) Chassis

Serial Number Location ...................................................................................................................... 26

Preparation for Disassembly .............................................................................................................. 27

External Security Devices .................................................................................................................. 28

Cable Lock ......................................................................................................................... 28

Padlock .............................................................................................................................. 28

HP Business PC Security Lock .......................................................................................... 29

Computer Access Panel ..................................................................................................................... 31

Front Bezel ......................................................................................................................................... 32

Removing Bezel Blanks ..................................................................................................................... 33

Cable Management ............................................................................................................................ 34

Cable Connections ............................................................................................................ 35

Memory .............................................................................................................................................. 36

Expansion Cards ................................................................................................................................ 39

Drives ................................................................................................................................................. 43

System Board Drive Connections ...................................................................................... 44

Drive Positions ................................................................................................................... 45

Removing an Optical Drive ................................................................................................ 46

Installing an Optical Drive into the 5.25-inch Drive Bay ..................................................... 47

Removing an External 3.5-inch Drive ................................................................................ 48

Installing a Drive into the 3.5-inch External Drive Bay ....................................................... 50

Removing an Internal 3.5-inch Hard Drive ......................................................................... 52

Installing an Internal 3.5-inch Hard Drive ........................................................................... 54

Front USB Panel ................................................................................................................................ 57

Power Switch/LED Assembly ............................................................................................................. 58

Heatsink ............................................................................................................................................. 59

Processor ........................................................................................................................................... 61

iv

Speaker .............................................................................................................................................. 62

Rear Chassis Fan ............................................................................................................................... 63

Power Supply ..................................................................................................................................... 64

System Board ..................................................................................................................................... 65

Battery ................................................................................................................................................ 66

Type 1 Battery Holder ........................................................................................................ 67

Type 2 Battery Holder ........................................................................................................ 67

Type 3 Battery Holder ........................................................................................................ 68

Appendix A Connector Pin Assignments

Keyboard ............................................................................................................................................ 69

Mouse ................................................................................................................................................. 69

Ethernet BNC ..................................................................................................................................... 69

Ethernet RJ-45 ................................................................................................................................... 70

Ethernet AUI ....................................................................................................................................... 70

Parallel Interface ................................................................................................................................ 71

Serial Interface, Powered and Non-Powered ..................................................................................... 71

USB .................................................................................................................................................... 72

Microphone ......................................................................................................................................... 72

Headphone ......................................................................................................................................... 72

Line-in Audio ...................................................................................................................................... 72

Line-out Audio .................................................................................................................................... 72

External Infrared Transceiver ............................................................................................................. 73

Monitor ............................................................................................................................................... 73

ATA/ATAPI (IDE) Standard Drive Cable ............................................................................................ 74

CD-ROM 50-Pin Connector ................................................................................................................ 75

24-Pin Power ...................................................................................................................................... 75

24-Pin MicroFit Power ........................................................................................................................ 76

4-Pin Power (for CPU) ........................................................................................................................ 76

6-Pin Power (for CPU) ........................................................................................................................ 76

SATA Data and Power ....................................................................................................................... 77

PCI Express ...................................................................................................................................... 77

PCI Express ....................................................................................................................................... 78

PCI Express Mini Card ....................................................................................................................... 79

DVI Connector .................................................................................................................................... 80

Appendix B Power Cord Set Requirements

General Requirements ....................................................................................................................... 81

Japanese Power Cord Requirements ................................................................................................ 81

Country-Specific Requirements .......................................................................................................... 82

Appendix C Troubleshooting

Safety and Comfort ............................................................................................................................ 83

Before You Call for Technical Support ............................................................................................... 83

Helpful Hints ....................................................................................................................................... 84

Solving General Problems .................................................................................................................. 85

Solving Hardware Installation Problems ............................................................................................. 88

Interpreting POST Audible Codes ...................................................................................................... 90

Contacting Customer Support ............................................................................................................ 91

v

Appendix D System Board and Riser Board Reference Designators

............................................................................................................................................................ 92

Appendix E Specifications

Index ................................................................................................................................................................. 100

vi

1 Installing and Customizing the Software

NOTE: If the computer was shipped with Windows Vista loaded, you will be prompted to register the

computer with HP Total Care before installing the operating system. You will see a brief movie followed
by an online registration form. Fill out the form, click the Begin button, and follow the instructions on the
screen.

CAUTION: Do not add optional hardware or third-party devices to the computer until the operating

system is successfully installed. Doing so may cause errors and prevent the operating system from
installing properly.

NOTE: Be sure there is a 10.2-cm (4-inch) clearance at the back of the unit and above the monitor to

permit the required airflow.

Installing the Operating System

The first time you turn on the computer, the operating system is installed automatically. This process
takes about 5 to 10 minutes, depending on which operating system is being installed. Carefully read
and follow the instructions on the screen to complete the installation.

CAUTION: Once the automatic installation has begun, DO NOT TURN OFF THE COMPUTER UNTIL

THE PROCESS IS COMPLETE. Turning off the computer during the installation process may damage
the software that runs the computer or prevent its proper installation.

NOTE: If the computer shipped with more than one operating system language on the hard drive, the

installation process could take up to 60 minutes.

If your computer was not shipped with a Microsoft operating system, some portions of this documentation
do not apply. Additional information is available in online help after you install the operating system.

Installing or Upgrading Device Drivers

When installing optional hardware devices after the operating system installation is complete, you must
also install the drivers for each of the devices.

If prompted for the i386 directory, replace the path specification with C:\i386, or use the Browse button
in the dialog box to locate the i386 folder. This action points the operating system to the appropriate
drivers.

Obtain the latest support software , including support software for the operating system from

http://www.hp.com/support. Select your country and language, select Download drivers and

software, enter the model number of the computer, and press Enter.

Installing the Operating System 1

HP Backup and Recovery Manager

The HP Backup and Recovery Manager is an easy-to-use, versatile application that allows you to back
up and recover the primary hard drive on the PC. The application works within Windows to create
backups of Windows, all applications, and all data files. Backups can be scheduled to occur
automatically at designated intervals, or they can be initiated manually. Important files can be archived
separately from regular backups.

HP Backup and Recovery Manager is preinstalled on the C: drive and creates a Recovery Partition.

Recovery Points and file backups can be copied to CD or DVD discs, while all backups can be copied
to network or secondary hard disks.

HP highly recommends that you create a Recovery Disc Set immediately before using the computer
and schedule regular automatic Recovery Point backups.

To create the Recovery Disc Set:

1. Click Start > HP Backup and Recovery > HP Backup and Recovery Manager to open the

Backup and Recovery Wizard, then click Next.

2. Select Create a set of recovery discs (Recommended) and click Next.

3. Follow the instructions in the wizard.

For more information on using HP Backup and Recovery Manager, refer to the HP Backup and Recovery
Manager User Guide by selecting Start > HP Backup and Recovery > HP Backup and Recovery

Manager Manual.

NOTE: You can order a Recovery Disc Set from HP by calling the HP support center. Go to the

following Web site, select your region, and click the Technical support after you buy link under the
Call HP heading to obtain the support center telephone number for your region.

http://welcome.hp.com/country/us/en/wwcontact_us.html

2 Chapter 1 Installing and Customizing the Software

2 Computer Setup (F10) Utility

Computer Setup (F10) Utilities

Use Computer Setup (F10) Utility to do the following:

Change factory default settings.

●

Set the system date and time.

●

Set, view, change, or verify the system configuration, including settings for graphics, audio, storage,

●

communications, and input devices.

View settings for processor and memory.

●

Modify the boot order of bootable devices such as hard drives, diskette drives, optical drives, or

●

USB flash media devices.

Restrict a device from booting the unit.

●

Run hard drive self-tests.

●

Establish a supervisor password that controls access to Computer Setup (F10) Utility and the

●

settings described in this section.

Enable or disable removable media boot ability.

●

Using Computer Setup (F10) Utilities

Computer Setup can be accessed only by turning the computer on or restarting the system. To access
the Computer Setup Utilities menu, complete the following steps:

1. Turn on or restart the computer.

2. As soon as the computer is turned on, press F10 when the monitor light turns green to enter

Computer Setup.

NOTE: If you do not press F10 at the appropriate time, you must restart the computer and again

press F10 when the monitor light turns green to access the utility.

3. The Computer Setup Utility screen is divided into menu headings and actions.

Five menu headings appear on the Computer Setup Utility screen:

Main

●

●

●

Advanced

Power

Computer Setup (F10) Utilities 3

Boot

●

Exit

●

Use the arrow keys to select the appropriate heading, then press Enter. Use the arrow (up and
down) keys to select the option you want, then press Enter. To return to the previous screen,
press Esc.

CAUTION: Do NOT turn the computer power OFF while the ROM is saving the Computer Setup (F10)

changes because the CMOS could become corrupted. It is safe to turn off the computer only after exiting
the F10 Setup screen.

Computer Setup—Main

NOTE: Support for specific Computer Setup options may vary depending on the hardware

configuration.

Table 2-1 Computer Setup—Main

Option Description

System Time Allows you to set system time.

System Date Allows you to set system date.

Language Allows you to select language.

Floppy Diskette A: Allows you to set drive A to:

Disabled

●

1.44 MB 3.5”

●

Not Installed

●

1st Drive

2nd Drive

3rd Drive

4th Drive

System Information (view only)

For each, allows you to:

(view only)

●

◦

◦

◦

◦

Smart Support - run HDD self-test for selected channel:

●

◦

◦

◦

Installed Memory

●

Memory Bank 1

●

Capacity (Size - HDD only)

Transfer Mode

SATA Speed

NCQ

SMART Status Check

SMART Short Self-Test

SMART Extended Self-Test

Memory Bank 2

●

Memory Bank 3

●

4 Chapter 2 Computer Setup (F10) Utility

Memory Bank 4

●

BIOS Revision

●

Core Version

●

Model Number

●

Product Number

●

Asset Tag (press Enter to change)

●

Computer Setup—Advanced

NOTE: Support for specific Computer Setup options may vary depending on the hardware

configuration.

WARNING! Setting items on this menu to incorrect values may cause your system to malfunction.

Table 2-2 Computer Setup—Advanced

Option Description

CPU Type (view only)

CPU Speed (view only)

Cache RAM (L2) (view only)

Cache RAM (L3) (view only - some models)

Primary Video Adapter Allows you to select the boot display device when more than 2 video options are offered by the

system:

PCI

●

PCI-Ex1

●

PCI-Ex16

●

Onboard

●

Onboard Video
Memory Size

PS/2 Mouse Allows you to set:

USB Legacy Mode
Support

32MB

●

128MB

●

256MB

●

Disabled

●

Enabled

●

Auto Detect

●

Allows you to set:

Disabled

●

Enabled

●

Onboard LAN Allows you to disable/enable onboard LAN controller.

Computer Setup (F10) Utilities 5

Table 2-2 Computer Setup—Advanced (continued)

Onboard LAN Boot
ROM

SATA Controller Allows you to set:

Onboard Audio Allows you to set the onboard audio to:

Internal Speaker Allows you to set the internal speaker to:

Supervisor Password Allows you to change supervisor password.

User Password Allows you to change the user password.

Allows you to disable/enable the boot ROM of the onboard LAN chip.

Disabled

●

SATA1

●

SATA1+2

●

Auto

●

Disabled

●

Enabled

●

Disabled

●

Enabled

●

Computer Setup—Power

NOTE: Support for specific Computer Setup options may vary depending on the hardware

configuration.

Table 2-3 Computer Setup—Power

Option Description

After AC Power Failure Allows you to select system restart behavior after power loss:

●

●

●

NX Disables/enables NX bit.

Auto

Power On

Stay Off

6 Chapter 2 Computer Setup (F10) Utility

Computer Setup—Boot

NOTE: Support for specific Computer Setup options may vary depending on the hardware

configuration.

Table 2-4 Computer Setup—Boot

Option Description

Boot-time Diagnostic
Screen

1st Boot Device

2nd Boot Device

3rd Boot Device

4th Boot Device

Floppy Group Boot
Priority

CD-ROM Group Boot
Priority

Hard Drive Group Boot
Priority

Network Group Boot
Priority

Disables/enables POST diagnostic messages display.

Allows you to specify which device groups will boot first, second, third, and fourth or to disable any
of the four:

Floppy Group

●

Hard Drive Group

●

CD-ROM Group

●

Network Boot Group

●

NOTE: MS-DOS drive lettering assignments may not apply after a non-MS-DOS operating system

has started.

Specifies boot device priority within removable devices.

Specifies boot device priority within CD/DVD drives.

Specifies boot device priority within hard drives.

Specifies boot device priority within bootable network devices.

Computer Setup—Exit

NOTE: Support for specific Computer Setup options may vary depending on the hardware

configuration.

Table 2-5 Computer Setup—Exit

Option Description

Exit Saving Changes Press Enter to exit saving changes.

Exit Discarding
Changes

Load Setup Defaults Press Enter to load setup defaults.

Discard Changes Press Enter to discard changes.

Save Changes Press Enter to save changes.

Press Enter to exit discarding changes.

Computer Setup (F10) Utilities 7

Recovering the Configuration Settings

To reset all BIOS Setup options to their default values (including options for ctrl+F10), you must enter
F10 Setup mode and press F5.

This does not include updates to system date, system time, supervisor password, user
password, and CPU frequency multiplier.

8 Chapter 2 Computer Setup (F10) Utility

3 Computer Diagnostic Features

HP Insight Diagnostics

NOTE: HP Insight Diagnostics is included on CD with some computer models only.

The HP Insight Diagnostics utility allows you to view information about the hardware configuration of
the computer and perform hardware diagnostic tests on the subsystems of the computer. The utility
simplifies the process of effectively identifying, diagnosing, and isolating hardware issues.

The Survey tab is displayed when you invoke HP Insight Diagnostics. This tab shows the current
configuration of the computer. From the Survey tab, there is access to several categories of information
about the computer. Other tabs provide additional information, including diagnostic test options and test
results. The information in each screen of the utility can be saved as an html file and stored on a diskette
or USB HP Drive Key.

Use HP Insight Diagnostics to determine if all the devices installed on the computer are recognized by
the system and functioning properly. Running tests is optional but recommended after installing or
connecting a new device.

You should run tests, save the test results, and print them so that you have printed reports available
before placing a call to the Customer Support Center.

NOTE: Third party devices may not be detected by HP Insight Diagnostics.

Accessing HP Insight Diagnostics

To access HP Insight Diagnostics, you must create a Recovery Disc Set then boot to the CD containing
the utility. It can also be downloaded from

HP Insight Diagnostics on page 13 for more information.

NOTE: HP Insight Diagnostics is included as part of the Recovery Disk Set with some computer

models only.

If you have already created a Recovery Disc Set, begin the following procedure at step 4.

1. Click Start > HP Backup and Recovery > HP Backup and Recovery Manager to open the

Backup and Recovery Wizard, then click Next.

2. Select Create a set of recovery discs (Recommended) and click Next.

3. Follow the instructions in the wizard to create a Recovery Disc Set.

4. Use Windows Explorer to search the Recovery Disc Set for the CD with the compaq\hpdiags

directory.

http://www.hp.com. See Downloading the Latest Version of

5. While the computer is on, insert the CD into an optical drive on the computer.

HP Insight Diagnostics 9

6. Shut down the operating system and turn off the computer.

7. Turn on the computer. The system will boot to the CD.

8. Select the appropriate language and click Continue.

9. In the End User License Agreement page, click Agree if you agree with the terms. The HP Insight

Survey Tab

The Survey tab displays important system configuration information.

In the View level field, you can select the Summary view to see limited configuration data or select
the Advanced view to see all the data in the selected category.

In the Category field, you can select the following categories of information to display:

NOTE: If the system does not boot to the CD in the optical drive, you may need to change the

boot order in the Computer Setup (F10) utility so that the system attempts to boot to the optical
drive before booting to the hard drive. Refer to
information.

NOTE: It is recommended that you accept the assigned default keyboard for your language

unless you want to test your specific keyboard.

Diagnostics utility launches with the Survey tab displayed.

Computer Setup (F10) Utility on page 3 for more

All—Gives a listing of all categories of information about the computer.

Overview—Gives you a listing of general information about the computer.

Architecture—Provides system BIOS and PCI device information.

Asset Control—Shows product name, asset tag, system serial number, and processor information.

Communication—Shows information about the computer parallel (LPT) and serial (COM) port settings,

plus USB and network controller information.

Graphics—Shows information about the graphics controller of the computer.

Input Devices—Shows information about the keyboard, mouse, and other input devices connected to

the computer.

Memory—Shows information about all memory in the computer. This includes memory slots on the
system board and any memory modules installed.

Miscellaneous—Shows HP Insight Diagnostics version information, computer configuration memory
(CMOS) information, system board data, and system management BIOS data.

Storage—Shows information about storage media connected to the computer. This list includes all fixed
disks, diskette drives, and optical drives.

System—Shows information about the computer model, processor, chassis, and BIOS, plus internal
speaker and PCI bus information.

10 Chapter 3 Computer Diagnostic Features

Test Tab

The Test tab allows you to choose various parts of the system to test. You can also choose the type of
test and testing mode.

There are three types of tests to choose from:

●

●

●

For each test type, there are two test modes to choose from:

●

●

To begin testing:

Quick Test—Provides a predetermined script where a sample of each hardware component is
exercised and requires no user intervention in either Unattended or Interactive mode.

Complete Test—Provides a predetermined script where each hardware component is fully tested.
There are more tests available in the Interactive mode, but these require user intervention.

Custom Test—Provides the most flexibility in controlling the testing of a system. The Custom Test
mode allows you to specifically select which devices, tests, and test parameters are run.

Interactive Mode—Provides maximum control over the testing process. The diagnostic software
will prompt you for input during tests that require your interaction. You may also determine whether
the test passed or failed.

Unattended Mode—Does not display prompts and requires no interaction. If errors are found, they
are displayed when testing is complete.

1. Select the Test tab.

2. Select the tab for the type of test you want to run: Quick, Complete, or Custom.

3. Select the Test Mode: Interactive or Unattended.

4. Choose how you want the test to be executed, either Number of Loops or Total Test Time. When

5. If performing a Quick Test or Complete Test, select the device to be tested from the drop-down

6. Click the Begin Testing button at the bottom right corner of the screen to start the test. The Status

7. If errors are found, go to the Log tab and click the Error Log to display more detailed information

Status Tab

The Status tab displays the status of the selected tests. The type of test executed (Quick, Complete,
or Custom) is also displayed. The main progress bar displays the percent complete of the current set
of tests. While testing is in progress, a Cancel Testing button is displayed for use if you want to cancel
the test.

choosing to run the test over a specified number of loops, enter the number of loops to perform. If
you desire to have the diagnostic test for a specified time period, enter the amount of time in
minutes.

list. If performing a Custom Test, Click the Expand button and select the devices to be tested or
click the Check All button to select all devices.

tab, which allows you to monitor the progress of the test, is automatically displayed during the
testing process. When the test is complete, the Status tab shows whether the device passed or
failed.

and recommended actions.

HP Insight Diagnostics 11

After testing has completed, the Cancel Testing button is replaced with a Retest button. The Retest
button will retest the last set of tests executed. This enables you to re-run the set of tests without having
to re-enter the data in the Test tab.

The Status tab also shows:

●

●

●

●

●

Log Tab

The Log tab contains a Test Log tab and an Error Log tab.

The Test Log displays all tests that have been executed, the number of times of execution, the number
of times failed, and the time it took to complete each test. The Clear Test Log button will clear the
contents of the Test Log.

The Error Log displays the tests for devices that have failed during the diagnostic testing and includes
the following columns of information.

The devices being tested

The test status (running, passed, or failed) of each device being tested

The overall test progress of all devices being tested

The test progress for each device being tested

The elapsed test times for each device being tested

●

●

●

●

●

●

The Clear Error Log button will clear the contents of the Error Log.

Help Tab

On the Help tab contains an HP Insight Diagnostics tab, an Error Codes tab, and a Test
Components tab.

The HP Insight Diagnostics tab contains help topics and includes search and index features.

The Error Codes tab provides a description of each numerical error code that may appear in the Error

Log tab located on the Log tab. Each code has a corresponding error Message and a Recommended
Repair action that should help solve the problem. To find an error code description quickly, enter the

code in the box at the top of the tab and click the Find Error Codes button.

The Device section displays the device tested.

The Test section displays the type of test run.

The Description section describes the error that the diagnostic test found.

The Recommended Repair will give a recommended action that should be performed to resolve
the failed hardware.

The Failed Count is the number of times the device has failed a test.

The Error Code provides a numerical code for the failure. The error codes are defined in the Help
tab.

The Test Components tab displays low-level information on tests that are run.

12 Chapter 3 Computer Diagnostic Features

Saving and Printing Information in HP Insight Diagnostics

You can save the information displayed in the HP Insight Diagnostics Survey and Log tabs to a diskette
or a USB 2.0 HP Drive Key (64MB or higher). You can not save to the hard drive. The system will
automatically create an html file that has the same appearance as the information displayed on the
screen.

1. Insert a diskette or USB 2.0 HP Drive Key (capacity must be 64MB or higher). USB 1.0 Drive Keys

are not supported.

2. Click Save in the bottom right corner of the screen.

3. Select Save to the floppy or Save to USB key.

4. Enter a file name in the File Name box and click the Save button. An html file will be saved to the

inserted diskette or USB HP Drive Key.

NOTE: Do not remove the diskette or USB key until you see a message indicating that the html

file has been written to the media.

5. Print the information from the storage device used to save it.

NOTE: To exit HP Insight Diagnostics, click Exit Diagnostics button in the bottom left corner of the

screen then remove the CD from the optical drive.

Downloading the Latest Version of HP Insight Diagnostics

1. Go to http://www.hp.com.

2. Click the Software & Driver Downloads link.

3. Enter your product number (for example, dx2400) in the text box and press the Enter key.

4. Select your specific computer model.

5. Select your OS.

6. Click the Diagnostic link.

7. Click HP Insight Diagnostics Offline Edition.

8. Select a language and click Download.

NOTE: The download includes instructions on how to create the bootable CD.

Protecting the Software

To protect software from loss or damage, you should keep a backup copy of all system software,
applications, and related files stored on the hard drive. See the operating system or backup utility
documentation for instructions on making backup copies of data files.

Protecting the Software 13

HP Backup and Recovery Manager

The HP Backup and Recovery Manager is an easy-to-use, versatile application that allows you to back
up and recover the primary hard drive on the PC. The application works within Windows to create
backups of Windows, all applications, and all data files. Backups can be scheduled to occur
automatically at designated intervals, or they can be initiated manually. Important files can be archived
separately from regular backups.

HP Backup and Recovery Manager is preinstalled on the C: drive and creates a Recovery Partition.

Recovery Points and file backups can be copied to CD or DVD discs, while all backups can be copied
to network or secondary hard disks.

HP highly recommends that you create a Recovery Disc Set immediately before using the computer
and schedule regular automatic Recovery Point backups.

To create the Recovery Disc Set:

1. Click Start > HP Backup and Recovery > HP Backup and Recovery Manager to open the

Backup and Recovery Wizard, then click Next.

2. Select Create a set of recovery discs (Recommended) and click Next.

3. Follow the instructions in the wizard.

For more information on using HP Backup and Recovery Manager, refer to the HP Backup and Recovery
Manager User Guide by selecting Start > HP Backup and Recovery > HP Backup and Recovery

Manager Manual.

NOTE: You can order a Recovery Disc Set from HP by calling the HP support center. Go to the

following Web site, select your region, and click the Technical support after you buy link under the
Call HP heading to obtain the support center telephone number for your region.

http://welcome.hp.com/country/us/en/wwcontact_us.html

14 Chapter 3 Computer Diagnostic Features

4 Serial and Parallel ATA Drive Guidelines

and Features

NOTE: Serial ATA = SATA

Parallel ATA = PATA

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 3.0 Gb/s

SATA connectors on the system board are color coded to make identification easier.

SATA Identification Color Port Attachment Sequence

Primary channel, device 0 Dark blue SATA 0 1

Primary channel, device 1 Light Blue SATA 2 4

Secondary channel, device 0 White SATA 1 2

Secondary channel, device 1 Orange SATA 3 3

NOTE: If there is an error on the application of the attach rules, a POST error message may be

displayed.

SATA Hard Drives 15

SATA Hard Drive Cables

SATA Data Cable

Always use an HP approved SATA 3.0 Gb/s cable as it is fully backwards compatible with the SATA 1.5
Gb/s drives.

Current HP desktop products ship with SATA 3.0 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. As shown
in the table, each cable has 3 grounds, and 4 transmit/receive pins.

Pin Number Usage Device Plug Host Plug

P1 Ground Ground Ground

P2 A+ Transmit data Receive data

P3 A- Transmit data Receive data

P4 Ground Ground Ground

P5 B- Receive data Transmit data

P6 B+ Receive data Transmit data

P7 Ground Ground Ground

P2 and P3 differential signal pair

P5 and P6 differential signal pair

SATA Power Cable

Pin Usage Notes Pin Usage Notes

P1 V3.3 3.3 V power P9 V5 5 V power

P2 V3.3 3.3 V power P10 Ground

P3 V3.3 3.3 V power P11 Ground

P4 Ground P12 Ground

P5 Ground P13 V12 12 V power

P6 Ground P14 V12 12 V power

P7 V5 5 V power P15 V12 12 V power

P8 V5 5 V power

16 Chapter 4 Serial and Parallel ATA Drive Guidelines and Features

PATA Device Information

The USDT model is the only product that supports a PATA optical drive. No PATA drives are supported
on any other model.

ATA SMART 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.

Hard Drive Capacities

The combination of the file system and the operating system used in the computer determines the
maximum usable size of a drive partition. A drive partition is the largest segment of a drive that may be
properly accessed by the operating system. A single hard drive may therefore be subdivided into a
number of unique drive partitions in order to make use of all of its space.

Because of the differences in the way that drive sizes are calculated, the size reported by the operating
system may differ from that marked on the hard drive or listed in the computer specification. Drive size
calculations by drive manufacturers are bytes to the base 10 while calculations by Microsoft are bytes
to the base 2.

Drive/Partition Capacity Limits

File System Controller Type Operating System Partition Drive

FAT 32 ATA Windows 2000/XP/Vista 32 GB 2 TB

NTFS ATA Windows 2000/XP/Vista 2 TB 2 TB

Maximum Size

PATA Device Information 17

5 Identifying the Chassis, Routine Care,

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.

Chassis Designation

Microtower (MT)

18 Chapter 5 Identifying the Chassis, Routine Care, and Disassembly Preparation

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

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.

55% 40% 10%

7,500 V

3,000 V

400 V

400 V

2,000 V

3,500 V

7,000 V

5,000 V

NOTE: 700 volts can degrade a product.

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.

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

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.

●

Electrostatic Discharge Information 19

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.

Static Shielding Protection Levels

Method

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.

●

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.

Voltage

1,500

7,500

15,000

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

●

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

●

20 Chapter 5 Identifying the Chassis, Routine Care, and Disassembly Preparation

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.

●

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.

Operating Guidelines 21

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 22 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 22 before cleaning the
keyboard.

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

Computer Case on page 22.

When cleaning debris from under the keys, review all rules in

on page 22 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.

●

Cleaning the

General Cleaning Safety Precautions

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.

22 Chapter 5 Identifying the Chassis, Routine Care, 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

●

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 22.

Cleaning the Computer Case on page 22.

Tools and Software Requirements

To service the computer, you need the following:

Torx T-15 screwdriver (HP screwdriver with bits, PN 161946-001)

●

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

●

Service Considerations 23

Diagnostics software

●

HP tamper-resistant T-15 wrench (Smart Cover FailSafe Key, PN 166527-001) or HP tamper-

●

resistant bits (Smart Cover FailSafe Key, PN 166527-002)

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 CPU.

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. For more information about preventing electrostatic damage, refer
to

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.

Electrostatic Discharge Information on page 19

24 Chapter 5 Identifying the Chassis, Routine Care, and Disassembly Preparation

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.

NOTE: Batteries, battery packs, and accumulators should not be disposed of together with the general

household waste. In order to forward them to recycling or proper disposal, please use the public
collection system or return them to HP, their authorized partners, or their agents.

Service Considerations 25

6 Removal and Replacement Procedures

Microtower (MT) Chassis

Adherence to the procedures and precautions described in this chapter is essential for proper service.
After completing all necessary removal and replacement procedures, run the Diagnostics utility to verify
that all components operate properly.

NOTE: Not all features listed in this guide are available on all computers.

Serial Number Location

Each computer has a unique serial number and product ID number that are located on the top of the
computer. Keep these numbers available for use when contacting customer service for assistance.

26 Chapter 6 Removal and Replacement Procedures Microtower (MT) Chassis

Preparation for Disassembly

See Identifying the Chassis, Routine Care, and Disassembly Preparation on page 18 for initial safety
procedures.

1. Remove/disengage any security devices that prohibit opening the computer (

Devices on page 28).

2. Close any open software applications.

3. Exit the operating system.

4. Remove any diskette, 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. 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.

External Security

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 27

External Security Devices

The following security devices are used to prevent unauthorized access to the internal components of
the computer and/or secure the computer to a fixed object.

Cable Lock

Padlock

28 Chapter 6 Removal and Replacement Procedures Microtower (MT) Chassis

HP Business PC Security Lock

1. Fasten the security cable by looping it around a stationary object.

2. Thread the keyboard and mouse cables through the lock.

External Security Devices 29

3. Screw the lock to the chassis using the screw provided.

4. Insert the plug end of the security cable into the lock (1) and push the button in (2) to engage the

lock. Use the key provided to disengage the lock.

30 Chapter 6 Removal and Replacement Procedures Microtower (MT) Chassis

Computer Access Panel

1. Prepare the computer for disassembly (Preparation for Disassembly on page 27).

CAUTION: Before removing the computer access panel, ensure that the computer is turned off

and that the power cord is disconnected from the electrical outlet.

2. Loosen the screw (1) that secures the access panel to the computer chassis.

3. Slide the access panel back (2) about 1.3 cm (1/2 inch), then lift it off the unit.

To install the access panel, reverse the removal procedure.

Computer Access Panel 31

Front Bezel

1. Prepare the computer for disassembly (Preparation for Disassembly on page 27).

2. Remove the computer access panel (

3. Press outward on the three latches on the right side of the bezel (1), then rotate the right side of

the bezel off the chassis (2) followed by the left side.

Computer Access Panel on page 31).

To reinstall the front bezel, reverse the removal procedure.

32 Chapter 6 Removal and Replacement Procedures Microtower (MT) Chassis

Removing Bezel Blanks

On some models, there are bezel blanks covering the 3.5-inch and 5.25-inch external drive bays that
need to be removed before installing a drive. To remove a bezel blank:

1. Remove the front bezel.

2. To remove a 5.25-inch blank, break the blank out of the bezel (1).

– or –

To remove a 3.25-inch blank, press the two tabs on the left side of the blank (2) toward the right,
and then pull the blank inward to remove it (3).

3. Replace the front bezel.

Removing Bezel Blanks 33

Cable Management

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

Keep cables away from major heat sources like the heatsink.

●

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 pre-folded. 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.

When removing the power supply power cables from the P1 or P3 connectors on the system board,
always follow these steps:

1. Squeeze on the top of the retaining latch attached to the cable end of the connector (1).

2. Grasp the cable end of the connector and pull it straight up (2).

CAUTION: Always pull the connector - NEVER pull on the cable. Pulling on the cable could

damage the cable and result in a failed power supply.

34 Chapter 6 Removal and Replacement Procedures Microtower (MT) Chassis

Cable Connections

System board connectors are color-coded to make it easier to find the proper connection.

System Board Connections

System Board Connector Name Connector Color Description

ATXPOWER white Power supply, 24-pin

ATX_CPU white Power supply, 4-pin

FLOPPY black Diskette drive

CPU_FAN white Heatsink fan

CHASSIS_FAN red Chassis fan

F_PANEL black Front power button/LED

F_USB1 white Front I/O USB

F_USB2 black Media card reader

F_AUDIO yellow Front I/O audio

SPEAKER white Internal speaker

XMM1

XMM2

XMM3

XMM4

PCI 1 white PCI 2.3 full-height slot

PCIE_X1_1 black PCI Express X1 slot

PCIE_X1_2 black PCI Express X1 slot

PCIE X16 black PCI Express X16 slot

PROCESSOR silver Processor

CMOS+PW black with blue cap Clear CMOS/password header

SATA0

SATA1

SATA2

SATA3

BATTERY black RTC battery

black

black

blue

blue

dark blue

white

light blue

orange

Memory slots

SATA drives

Cable Management 35

Memory

The computer comes with double data rate 2 synchronous dynamic random access memory (DDR2­SDRAM) dual inline memory modules (DIMMs).

The memory sockets on the system board can be populated with up to four industry-standard DIMMs.
These memory sockets are populated with at least one preinstalled DIMM. To achieve the maximum
memory support, you can populate the system board with up to 4 GB of memory configured in a high­performing dual channel mode.

For proper system operation, the DDR2-SDRAM DIMMs must be:

●

●

●

The DDR2-SDRAM DIMMs must also:

●

●

In addition, the computer supports:

industry-standard 240-pin

unbuffered, PC2-5300 667 MHz-compliant or PC2-6400 800 MHz-compliant

1.8 volt DDR2-SDRAM DIMMs

support CAS latency 5 DDR2 667 Mhz (5-5-5 timing), CAS latency 5 DDR2 800 Mhz (5-5-5 timing),
and CAS latency 6 DDR2 800 Mhz (6-6-6 timing)

contain the mandatory JEDEC SPD information

512Mbit and 1Gbit non-ECC memory technologies

●

single-sided and double-sided DIMMs

●

DIMMs constructed with x8 and x16 DDR devices; DIMMs constructed with x4 SDRAM are not

●

supported

NOTE: The system will not operate properly if you install unsupported DIMMs.

There are four DIMM sockets on the system board, with two sockets per channel. The sockets are
labeled XMM1, XMM2, XMM3, and XMM4. Sockets XMM1 and XMM2 operate in memory channel A.
Sockets XMM3 and XMM4 operate in memory channel B.

36 Chapter 6 Removal and Replacement Procedures Microtower (MT) Chassis

Item Description Socket Color

1 DIMM socket XMM1, Channel A

(populate first)

2 DIMM socket XMM2, Channel B

(populate second)

3 DIMM socket XMM3, Channel A Blue

4 DIMM socket XMM4, Channel B Blue

Black

Black

The system will automatically operate in single channel mode or dual channel mode, depending on how
the DIMMs are installed.

The system will operate in a higher-performing dual channel mode if like-sized DIMMs of equal

●

capacity are populated in one or both pairs of sockets. For example, if the Channel A XMM1 socket
and Channel B XMM2 socket (the two black sockets) both have 1024MB DIMMs installed, the
system will operate in dual channel mode. If this system had two additional DIMMs added into the
blue sockets, they could be a pair of 512MBor 1024MB DIMMs and the system would still operate
in dual channel mode. For purposes of “like sizes,” a single-sided 512MB DIMM and a double-sided
512MB DIMM would not be the same size because they have different numbers of memory chips
on them.

The system will operate in single channel mode if the DIMMs are populated in any other supported

●

configuration. Supported configurations consist of any combination of one, two, three, or four
DIMMs as long as socket XMM1 is populated before socket XMM3 in Channel A, and socket XMM2
is populated before socket XMM4 in Channel B.

If a single DIMM is installed, it must be installed in the XMM1 socket.

●

In either mode, the maximum operational speed is determined by the slowest DIMM in the system.

●

Memory 37

CAUTION: The memory module sockets have gold metal contacts. When upgrading the memory, it

is important to use memory modules with gold metal contacts to prevent corrosion and/or oxidation
resulting from having incompatible metals in contact with each other.

Static electricity can damage the electronic components of the computer or optional cards. Before
beginning these procedures, ensure that you are discharged of static electricity by briefly touching a
grounded metal object. Refer to

Electrostatic Discharge Information on page 19 for more information.

When handling a memory module, be careful not to touch any of the contacts. Doing so may damage
the module.

1. Prepare the computer for disassembly (Preparation for Disassembly on page 27).

2. Remove the computer access panel (

Computer Access Panel on page 31).

3. Open both latches of the memory module socket (1), and insert the memory module into the

socket (2).

NOTE: A memory module can be installed in only one way. Match the notch on the module with

the tab on the memory socket. A DIMM must occupy the black XMM1 socket.

NOTE: For maximum performance, populate the sockets so that the memory capacity is spread

as equally as possible between Channel A and Channel B.

4. Push the DIMM module down firmly into the socket, ensuring that the module is fully inserted and

properly seated. The DIMM must be pushed all the way down into the socket and sit evenly in the
socket to avoid memory corruption. Make sure the latches are in the closed position (3).

5. Repeat steps 3 and 4 for any additional modules that you want to install.

NOTE: The computer automatically recognizes the additional memory when turned on.

To reassemble the computer, reverse the removal procedure.

38 Chapter 6 Removal and Replacement Procedures Microtower (MT) Chassis

Expansion Cards

The computer has one standard PCI expansion slot that can accommodate an expansion card up to

17.46 cm (6.875 inches) in length. The computer also has two PCI Express x1 expansion slots and one
PCI Express x16 expansion slot.

Table 6-1 Expansion Slot Locations

Item Description

1 PCI expansion slot

2 PCI Express x1 expansion slot

3 PCI Express x1 expansion slot

4 PCI Express x16 expansion slot

NOTE: You can install a PCI Express x1, x4, x8, or x16 expansion card in the PCI Express x16

expansion slot.

To remove, replace, or add an expansion card:

1. Prepare the computer for disassembly (

2. Remove the computer access panel (

Preparation for Disassembly on page 27).

Computer Access Panel on page 31).

3. Locate the correct vacant expansion socket on the system board and the corresponding expansion

slot on the back of the computer chassis.

Expansion Cards 39

4. On the rear of the computer, a slot cover lock secures the expansion card brackets in place.

Remove the screw from the slot cover lock then slide the slot cover lock up to remove it from the
chassis.

5. Before installing an expansion card, remove the expansion slot cover or the existing expansion

card.

NOTE: Before removing an installed expansion card, disconnect any cables that may be attached

to the expansion card.

a. If you are installing an expansion card in a vacant socket, you must use a flatblade screwdriver

to pry out the metal shield on the rear panel that covers the expansion slot. Be sure to remove
the appropriate shield for the expansion card you are installing.

40 Chapter 6 Removal and Replacement Procedures Microtower (MT) Chassis

b. If you are removing a standard PCI card, hold the card at each end and carefully rock it back

and forth until the connectors pull free from the socket. Be sure not to scrape the card against
the other components.

c. If you are removing a PCI Express x16 card, pull the retention arm on the back of the expansion

socket away from the card and carefully rock the card back and forth until the connectors pull
free from the socket. Be sure not to scrape the card against the other components.

6. Store the removed card in anti-static packaging.

7. If you are not installing a new expansion card, install an expansion slot cover to close the open

slot.

CAUTION: After removing an expansion card, you must replace it with a new card or expansion

slot cover for proper cooling of internal components during operation.

Expansion Cards 41

8. To install a new expansion card, hold the card just above the expansion socket on the system

board then move the card toward the rear of the chassis so that the bottom of the bracket on the
card slides into the small slot on the chassis. Press the card straight down into the expansion socket
on the system board.

NOTE: When installing an expansion card, press firmly on the card so that the whole connector

seats properly in the expansion card slot.

9. Replace the slot cover lock and secure it in place with the screw that was previously removed.

10. Connect external cables to the installed card, if needed. Connect internal cables to the system

board, if needed.

11. Reconfigure the computer, if necessary. Refer to the Computer Setup (F10) Utility Guide for

instructions on using Computer Setup.

42 Chapter 6 Removal and Replacement Procedures Microtower (MT) Chassis

Drives

When installing additional drives, follow these guidelines:

●

●

●

●

●

●

●

●

●

●

The primary Serial ATA (SATA) hard drive must be connected to the dark blue primary SATA
connector on the system board labeled SATA0.

Connect the first SATA optical drive to the white SATA connector on the system board labeled
SATA1.

Always populate the dark blue SATA0 and white SATA1 connectors before the light blue SATA2
and orange SATA3 connectors.

Connect a second SATA optical drive to the orange SATA3 connector.

Connect additional SATA hard drives to the next available (unpopulated) SATA connector on the
system board in the following order: SATA0, SATA1, SATA3, SATA2.

Connect a diskette drive to the connector labeled FLOPPY.

Connect a media card reader to the USB connector labeled F_USB2.

The system does not support Parallel ATA (PATA) optical drives or PATA hard drives.

You may install either a third-height or a half-height drive into a half-height bay.

If needed, HP has provided extra drive retainer screws on the interior of the front bezel that are
used to secure the drives in the drive cage. Hard drives use 6-32 standard screws. All other drives
use M3 metric screws. The HP-supplied 6-32 standard screws (1) are silver. The HP-supplied M3
metric guide screws (2) are black.

Drives 43

CAUTION: To prevent loss of work and damage to the computer or drive:

If you are inserting or removing a drive, shut down the operating system properly, turn off the computer,
and unplug the power cord. Do not remove a 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.

Handle a drive carefully; do not drop it.

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.

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

System Board Drive Connections

Refer to the following illustration and table to identify the system board drive connectors.

Table 6-2 System Board Drive Connections

No. System Board Connector System Board Label Color

1 Media Card Reader F_USB2 black

2 SATA0 SATA0 dark blue

3 SATA1 SATA1 white

4 SATA2 SATA2 light blue

44 Chapter 6 Removal and Replacement Procedures Microtower (MT) Chassis

Table 6-2 System Board Drive Connections (continued)

No. System Board Connector System Board Label Color

5 SATA3 SATA3 orange

6 Diskette Drive FLOPPY black

To verify the type, size, and capacity of the storage devices installed in the computer, run Computer
Setup. Refer to

Drive Positions

Computer Setup (F10) Utility on page 3 for more information.

1 Two 5.25-inch external drive bays for optional drives (optical drives shown)

2 One 3.5-inch external drive bay for optional drive (media card reader shown)

3 Primary 3.5-inch internal hard drive bay

4 Secondary 3.5-inch internal hard drive bay for optional hard drive

To verify the type and size of the storage devices installed in the computer, run Computer Setup. Refer

Computer Setup (F10) Utility on page 3 for more information.

to

Drives 45

Removing an Optical Drive

CAUTION: All removable media should be taken out of a drive before removing the drive from the

computer.

To remove an optical drive:

1. Prepare the computer for disassembly (

2. Remove the computer access panel (

3. Remove the front bezel (

4. Disconnect the power cable (1) and data cable (2) from the rear of the optical drive.

5. Remove the screws that secure the drive to the drive cage (1), then slide the drive out of the front

of the chassis (2).

Front Bezel on page 32).

Preparation for Disassembly on page 27).

Computer Access Panel on page 31).

46 Chapter 6 Removal and Replacement Procedures Microtower (MT) Chassis

Installing an Optical Drive into the 5.25-inch Drive Bay

To install an optional 5.25-inch optical drive:

1. Prepare the computer for disassembly (

2. Remove the computer access panel (

3. Remove the front bezel (

4. If you are installing a drive in a bay covered by a bezel blank, remove the front bezel then remove

the bezel blank. See

5. If you are adding a drive to an empty lower optical drive bay, you must remove the knockout plate

from the bay. To do so, insert a flat screwdriver into the knockout plate slot and rotate the
screwdriver to break the knockout plate out of the chassis. Discard the knockout plate.

6. If the new drive has screws installed on the sides of the drive, remove the screws before inserting

the drive into the chassis.

7. Slide the drive in through the front of the chassis (1) until the bezel on the drive is evenly aligned

with the computer front bezel and install the M3 metric retainer screws (2) as shown in the
illustration below.

NOTE: Extra drive retainer screws are provided on the interior of the front bezel if needed. The

M3 metric retainer screws for optical drives are black.

Front Bezel on page 32).

Removing Bezel Blanks on page 33 for more information.

Preparation for Disassembly on page 27).

Computer Access Panel on page 31).

8. If the system configuration includes only one optical drive, connect the SATA data cable to the

white system board connector labeled SATA1 . If you are adding a second optical drive, connect
the SATA data cable to the orange system board connector labeled SATA3.

Drives 47

9. Connect the power cable (1) and data cable (2) to the rear of the optical drive.

10. Replace the front bezel and access panel.

11. Lock any security devices that were disengaged when the access panel was removed.

The system automatically recognizes the drive and reconfigures the computer.

Removing an External 3.5-inch Drive

CAUTION: All removable media should be taken out of a drive before removing the drive from the

computer.

NOTE: The 3.5-inch drive bay may contain a diskette drive or a media card reader.

1. Prepare the computer for disassembly (Preparation for Disassembly on page 27).

2. Remove the computer access panel (

3. Remove the front bezel (

Front Bezel on page 32).

Computer Access Panel on page 31).

48 Chapter 6 Removal and Replacement Procedures Microtower (MT) Chassis

4. Disconnect the drive cables, as indicated in the following illustrations:

a. If you are removing a diskette drive, disconnect the data cable (1) and power cable (2) from

the back of the drive.

b. If you are removing a media card reader, disconnect the USB cable from the system board.

Drives 49

5. Remove the retainer screws that secure the drive to the bay (1) then slide the drive forward and

out of the bay (2).

Installing a Drive into the 3.5-inch External Drive Bay

The 3.5-inch external drive bay on the front of the computer can be configured with a media card reader
or a diskette drive.

1. Prepare the computer for disassembly (

2. Remove the computer access panel (

3. Remove the front bezel (

4. If you are installing a diskette drive or media card reader in a bay covered by a bezel blank, remove

the front bezel then remove the bezel blank. See
information.

5. If you are adding a drive to an empty drive bay for the first time, you must remove the knockout

plate from the bay. To do so, insert a flat screwdriver into the knockout plate slot and rotate the
screwdriver to break the knockout plate out of the chassis. Discard the knockout plate.

6. If the new drive has screws installed on the sides of the drive, remove them before inserting the

drive into the chassis.

Front Bezel on page 32).

Preparation for Disassembly on page 27).

Computer Access Panel on page 31).

Removing Bezel Blanks on page 33 for more

50 Chapter 6 Removal and Replacement Procedures Microtower (MT) Chassis

7. Slide the drive in through the front of the chassis (1) until the bezel on the drive is evenly aligned

with the computer front bezel and install the M3 metric retainer screws (2) as shown in the
illustration below.

NOTE: Extra drive retainer screws are provided on the interior of the front bezel if needed. The

M3 metric retainer screws for diskette drives or media card readers are black.

8. Connect the appropriate drive cables:

a. If installing a diskette drive, connect the power and data cables to the rear of the drive and

connect the other end of the data cable to the connector on the system board labeled FLOPPY.

b. If installing a media card reader, connect the USB cable from the media card reader to the

USB connector on the system board labeled F_USB2.

NOTE: Refer to System Board Drive Connections on page 44 for an illustration of the system

board drive connectors.

9. Replace the front bezel and access panel.

10. Lock any security devices that were disengaged when the access panel was removed.

Drives 51

Removing an Internal 3.5-inch Hard Drive

NOTE: Before you remove the old hard drive, be sure to back up the data from the old hard drive so

that you can transfer the data to the new hard drive. Also, if you are replacing the primary hard drive,
make sure you have created a Recovery Disc Set to restore the operating system, software drivers, and
any software applications that were preinstalled on the computer. If you do not have this CD set,
select Start > HP Backup and Recovery and create it now.

1. Prepare the computer for disassembly (Preparation for Disassembly on page 27).

2. Remove the computer access panel (

3. Remove the two screws that secure the hard disk drive cage to the chassis.

4. Push down the latch on the side of the hard disk drive cage (1), then slide the hard disk drive cage

away from the bottom of the chassis (2) as shown below.

Computer Access Panel on page 31).

52 Chapter 6 Removal and Replacement Procedures Microtower (MT) Chassis

5. Lift the hard disk drive cage out of the chassis.

6. Disconnect the power cable (1) and data cable (2) from the back of the hard drive.

Drives 53

7. Remove the four screws that secure the hard disk drive to the hard disk drive cage (1), then slide

the hard disk drive out of the hard disk drive cage (2).

Installing an Internal 3.5-inch Hard Drive

1. Follow the steps in Removing an Internal 3.5-inch Hard Drive on page 52 to remove the hard drive

cage and, if necessary, the existing hard drive.

54 Chapter 6 Removal and Replacement Procedures Microtower (MT) Chassis

2. Slide the new drive into the hard disk drive cage (1), aligning the drive with the four screw holes

on the cage. Install the four 6-32 standard screws that secure the hard disk drive to the hard disk
drive cage (2). Make sure the hard disk drive cables are facing the top of the drive cage.

NOTE: If you are replacing an old drive with a new drive, use the four retainer screws from the

old drive to install the new drive.

NOTE: If you are installing a second hard drive, use four of the extra standard 6-32 screws that

are installed on the interior of the front bezel. The 6-32 screws are silver.

3. Connect the power cable (1) and data cable (2) to the back of the hard drive.

CAUTION: Never crease or bend a SATA data cable tighter than a 30 mm (1.18 in) radius. A

sharp bend can break the internal wires.

Drives 55

4. Place the hard disk drive cage into the chassis (1), then slide it down toward the bottom of the

chassis until it locks into place (2).

5. Attach the two screws that secure the hard disk drive cage to the chassis.

6. If installing a new drive, connect the opposite end of the data cable to the appropriate system board

connector.

NOTE: If your system has only one SATA hard drive, you must connect the hard drive data cable

to the dark blue connector labeled SATA0 to avoid any hard drive performance problems. If you
are adding a second hard drive, connect the data cable to the next available (unpopulated) SATA
connector on the system board in the following order: SATA0, SATA1, SATA3, SATA2.

7. Replace the computer access panel.

8. Lock any security devices that were disengaged when the access panel was removed.

56 Chapter 6 Removal and Replacement Procedures Microtower (MT) Chassis

NOTE: If you are replacing the primary hard drive, use the Recovery Disc Set to restore the operating

system, software drivers, and any software applications that were preinstalled on the computer.

Front USB Panel

1. Prepare the computer for disassembly (Preparation for Disassembly on page 27).

2. Remove the computer access panel (

3. Remove the front bezel (

4. Disconnect the front USB cable from the yellow system board connector (F_AUDIO) and the I/O

cable from the white system board connector (F_USB1).

5. Stand the unit upright.

6. Remove the silver T15 screw (1) that secures the panel to the chassis.

7. Pull the panel (2) away from the unit while threading the wires between the drive cage and the

baffle and through the hole in the front of the chassis.

Front Bezel on page 32).

Computer Access Panel on page 31).

To reinstall the panel, reverse the removal procedure.

Front USB Panel 57

Power Switch/LED Assembly

1. Prepare the computer for disassembly (Preparation for Disassembly on page 27).

2. Remove the computer access panel (

3. Remove the front bezel (

4. Remove the optical drive (

5. Disconnect the cable from the black system board connector labeled F_PANEL.

6. Remove the cable from the metal clamps on the side of the drive cage. This step may require a

flat blade screwdriver to lift the clamps enough to remove the cable.

7. To remove the power button assembly, perform the following steps simultaneously:

a. On the right side of the assembly, press down on the top tab (1).

b. Press in on the tab on the right side of the assembly (2).

c. While pressing the two tabs, pull the assembly away from the chassis enough to loosen the

tabs from their slots in the chassis.

Front Bezel on page 32).

Removing an Optical Drive on page 46).

Computer Access Panel on page 31).

8. Pull the assembly away from the chassis while threading the wire through the hole in the front of

the chassis.

9. Remove the assembly from the chassis.

To reinstall the assembly, reverse the removal procedures. Be sure to route the cable through the metal
clamps on the side of the drive cage.

58 Chapter 6 Removal and Replacement Procedures Microtower (MT) Chassis

Heatsink

You will need a screwdriver with a narrow shaft to loosen the heatsink screws.

1. Prepare the computer for disassembly (

2. Remove the computer access panel (

3. Unplug the fan cable from the system board (CPU FAN).

4. Lift the silver latch that tightens the heatsink, and then pull the latch toward the heatsink to remove

the metal hook from the tab on the backplate.

Preparation for Disassembly on page 27).

Computer Access Panel on page 31).

5. Pull the latch up so the metal hook rests above the tab on the backplate, and then press the latch

toward the heatsink to disengage the metal hook on the opposite side of the heatsink from the
backplate.

6. Lift the heatsink from the processor.

7. Remove the heatsink from the processor.

When reinstalling the heatsink, make sure that its bottom has been cleaned with an alcohol wipe and
fresh thermal grease has been applied to the top of the processor.

CAUTION: Heatsink retaining screws should be tightened in diagonally opposite pairs (as in an X) to

evenly seat the heatsink on the processor. This is especially important as the pins on the socket are
very fragile and any damage to them may require replacing the system board.

Heatsink 59

To remove the backplate from the system board:

1. Remove the four silver Phillips screws that secure the backplate to the system board.

2. Remove the backplate from the system board.

60 Chapter 6 Removal and Replacement Procedures Microtower (MT) Chassis

Processor

1. Prepare the computer for disassembly (Preparation for Disassembly on page 27).

2. Remove the computer access panel (

3. Remove the heatsink (

4. Rotate the locking lever to its full open position (1).

5. Raise and rotate the microprocessor retainer to its fully open position (2).

6. Carefully lift the processor from the socket (3).

CAUTION: Do NOT handle the pins in the processor socket. These pins are very fragile and

handling them could cause irreparable damage. Once pins are damaged it may be necessary to
replace the system board.

The heatsink must be installed within 24 hours of installing the processor to prevent damage to the
processor’s solder connections.

Heatsink on page 59).

Computer Access Panel on page 31).

To install a new processor:

1. Place the processor in its socket and close the retainer.

2. Secure the locking lever.

If reusing the existing heatsink, go to step 3.

If using a new heatsink, go to step 5.

3. If reusing the existing heatsink, apply the thermal grease provided in the spares kit to the top of

the processor.

4. Clean the bottom of the heatsink with the provided alcohol pad and place it atop the processor.

Processor 61

5. If using a new heatsink, remove the protective covering from the bottom of the heatsink and place

6. Secure the heatsink to the system board and system board tray with the four captive screws and

NOTE: After installing a new processor onto the system board, always update the system ROM to

ensure that the latest version of the BIOS is being used on the computer. The latest system BIOS can
be found on the Web at:

Speaker

1. Prepare the computer for disassembly (Preparation for Disassembly on page 27).

it in position atop the processor.

attach the heatsink control cable to the system board.

CAUTION: Heatsink retaining screws should be tightened in diagonally opposite pairs (as in an

X) to evenly seat the heatsink on the processor. This is especially important as the pins on the
socket are very fragile and any damage to them may require replacing the system board.

http://h18000.www1.hp.com/support/files.

2. Remove the computer access panel (

3. Remove the front bezel (

4. Disconnect the wire from the white system board connector labeled SPEAKER.

NOTE: Note the routing of the speaker wire – behind the hard drive cage bracket, through the

metal clamp on the chassis, through the metal clamp on the side of the second hard drive cage,
and then down to the system board.

5. From the outside of the chassis, remove the three silver T15 screws that secure the speaker to the

chassis.

Front Bezel on page 32).

Computer Access Panel on page 31).

6. Lift the speaker out of the chassis.

To replace the speaker, reverse the removal procedures.

62 Chapter 6 Removal and Replacement Procedures Microtower (MT) Chassis

When replacing the speaker, be sure to route the wire behind the hard drive cage bracket, through the
metal clamp on the chassis, through the metal clamp on the side of the second hard drive cage, and
then down to the system board.

Rear Chassis Fan

1. Prepare the computer for disassembly (Preparation for Disassembly on page 27).

2. Remove the computer access panel (

3. Disconnect the fan control cable from the red system board connector labeled SYS_FAN1.

4. From the outside, remove the four silver Phillips screws that secure the fan to the chassis.

Computer Access Panel on page 31).

5. Lift the fan out of the chassis.

To install the fan assembly, reverse the removal procedure. Be sure to orient the air flow out of the unit.

Rear Chassis Fan 63

Power Supply

1. Prepare the computer for disassembly (Preparation for Disassembly on page 27).

2. Remove the computer access panel (

3. Disconnect all power cables from the drives and from the system board.

4. Remove the four silver T15 screws that connect the power supply to the chassis.

Computer Access Panel on page 31).

5. While pressing the tab in front of the power supply that holds it in place, pull the power supply up

slightly to loosen it from the chassis.

6. Lift the power supply out of the chassis.

64 Chapter 6 Removal and Replacement Procedures Microtower (MT) Chassis

To install the power supply, reverse the removal procedure.

System Board

1. Prepare the computer for disassembly (Preparation for Disassembly on page 27).

2. Remove the computer access panel (

3. Remove all expansion boards (

4. Disconnect all cables connected to the system board, noting their location for reinstallation.

5. Remove the heatsink (

6. Remove the remaining eight screws that secure the system board to the chassis.

Heatsink on page 59).

Computer Access Panel on page 31).

Expansion Cards on page 39).

7. Slide the system board toward the front of the computer to disengage the I/O panel from the rear

of the chassis.

8. Lift the system board out of the computer.

When reinstalling the system board, first insert the I/O panel back into the slots in the rear of the chassis,
and then align the board with the chassis screw holes.

NOTE: When replacing the system board, you must change the chassis serial number in the BIOS.

System Board 65

Battery

The battery that comes with the computer provides power to the real-time clock. When replacing the
battery, use a battery equivalent to the battery originally installed in the computer. The computer comes
with a 3-volt lithium coin cell battery.

WARNING! The computer contains an internal lithium manganese dioxide battery. There is a risk of

fire and burns if the battery is not handled properly. To reduce the risk of personal injury:

Do not attempt to recharge the battery.

Do not expose to temperatures higher than 60°C (140ºF).

Do not disassemble, crush, puncture, short external contacts, or dispose of in fire or water.

Replace the battery only with the HP spare designated for this product.

CAUTION: Before replacing the battery, it is important to back up the computer CMOS settings. When

the battery is removed or replaced, the CMOS settings will be cleared. Refer to

Utility on page 3 for information on backing up the CMOS settings.

Static electricity can damage the electronic components of the computer or optional equipment. Before
beginning these procedures, ensure that you are discharged of static electricity by briefly touching a
grounded metal object.

NOTE: The lifetime of the lithium battery can be extended by plugging the computer into a live AC wall

socket. The lithium battery is only used when the computer is NOT connected to AC power.

Computer Setup (F10)

HP encourages customers to recycle used electronic hardware, HP original print cartridges, and
rechargeable batteries. For more information about recycling programs, go to

recycle.

1. Prepare the computer for disassembly (Preparation for Disassembly on page 27).

2. Remove the computer access panel (

NOTE: It may be necessary to remove an expansion card to gain access to the battery.

3. Locate the battery and battery holder on the system board.

4. Depending on the type of battery holder on your system board, complete the following instructions

to replace the battery:

Computer Access Panel on page 31).

http://www.hp.com/

66 Chapter 6 Removal and Replacement Procedures Microtower (MT) Chassis

Type 1 Battery Holder

1. Lift the battery out of its holder.

2. Slide the replacement battery into position, positive side up.

3. The battery holder automatically secures the battery in the proper position.

4. Replace the computer access panel.

5. Plug in the computer and turn on power to the computer.

6. Reset the date and time and any special system setups using Computer Setup. Refer to

Setup (F10) Utility on page 3.

Type 2 Battery Holder

1. To release the battery from its holder, squeeze the metal clamp (1) that extends above one edge

of the battery. When the battery pops up, lift it out.

2. To insert the new battery, slide one edge of the replacement battery under the holder’s lip with the

positive side up (2). Push the other edge down until the clamp snaps over the other edge of the
battery.

Computer

3. Replace the computer access panel.

Battery 67

4. Plug in the computer and turn on power to the computer.

5. Reset the date and time and any special system setups using Computer Setup. Refer to

Setup (F10) Utility on page 3.

Type 3 Battery Holder

1. Pull back on the clip (1) that holds the battery in place, then remove the battery (2).

2. Insert the new battery and position the clip back in place.

Computer

3. Replace the computer access panel.

4. Plug in the computer and turn on power to the computer.

5. Reset the date and time and any special system setups using Computer Setup. Refer to

Setup (F10) Utility on page 3.

Computer

68 Chapter 6 Removal and Replacement Procedures Microtower (MT) Chassis

A Connector Pin Assignments

This appendix contains the pin assignments for many computer and workstation connectors. Some of
these connectors may not be used on the product being serviced.

Keyboard

Connector and Icon Pin Signal

Mouse

1

2

3

4

5

6

Connector and Icon Pin Signal

1

2

3

4

5

6

Data

Unused

Ground

+5 VDC

Clock

Unused

Data

Unused

Ground

+5 VDC

Clock

Unused

Ethernet BNC

Connector and Icon Pin Signal

1

2

Data

Ground

Keyboard 69

Ethernet RJ-45

Connector and Icon Pin Signal

Ethernet AUI

Connector and Icon

Pin Signal Pin Signal

1

2

3

4

5

6

7

8

(+) Transmit Data

(-) Transmit Data

(+) Receive Data

Unused

Unused

(-) Receive Data

Unused

Unused

1

Ground

2

Negative AUI Differential Collision

3

Positive AUI Differential Collision

4

Negative AUI Differential Transmit

5

Positive AUI Differential Transmit

6

Ground

7

Ground

8

Negative AUI Differential Receive

9

10

11

12

13

14

15

16

Positive AUI Differential Receive

+12V

Ground

Ground

Unused

Unused

Unused

Unused

70 Appendix A Connector Pin Assignments

Parallel Interface

Connector and Icon

Pin Signal Pin Signal

1

2

3

4

5

6

7

8

9 Data Bit 7 18–25 Signal Ground

Strobe

Data Bit 0

Data Bit 1

Data Bit 2

Data Bit 3

Data Bit 4

Data Bit 5

Data Bit 6

10

11

12

13

14

15

16

17

Acknowledge

Busy

Paper End

Select

Auto Linefeed

Error

Initialize Printer

Select IN

Serial Interface, Powered and Non-Powered

Connector and Icon Pin Signal

1

2

3

Carrier Detect (12V if powered)

Receive Data

Transmit Data

4

5

6

7

8

9

Data Terminal Ready

Signal Ground

Data Set Ready

Request to Send

Clear to Send

Ring Indicator (5V if powered)

Parallel Interface 71

USB

Connector and Icon Pin Signal

Microphone

Connector and Icon (1/8” miniphone) Pin Signal

1

3

2

Headphone

Connector and Icon (1/8” miniphone) Pin Signal

1

3

2

1

2

3

4

1 (Tip)

2 (Ring)

3 (Shield)

1 (Tip)

2 (Ring)

+5 VDC

- Data

+ Data

Ground

Audio_left

Power_Right

Audio_right

Audio_left

Power_Right

Line-in Audio

Connector and Icon (1/8” miniphone) Pin Signal

1

3

2

Line-out Audio

Connector and Icon (1/8” miniphone) Pin Signal

1

3

2

3 (Shield)

1 (Tip)

2 (Ring)

3 (Shield)

1 (Tip)

2 (Ring)

3 (Shield)

Ground

Audio_In_Left

Audio_In_Right

Ground

Audio_Out_Left

Audio_Out_Right

Ground

72 Appendix A Connector Pin Assignments

External Infrared Transceiver

Connector and Icon Pin Signal

Monitor

Connector and Icon

Pin Signal Pin Signal

1

2

3

4

5

6

7

8

Transmit

Receive

Ground

5V

Mode

Not Used

Not Used

Not Used

1

2

3

4

5

6

7

8

Red Analog

Green Analog

Blue Analog

Not used

Ground

Ground

Ground

Ground

9

10

11

12

13

14

15

+5V (fused)

Ground

Not used

DDC Serial Data

Horizontal Sync

Vertical Sync

DDC Serial Clock

External Infrared Transceiver 73

ATA/ATAPI (IDE) Standard Drive Cable

Connector

Pin Signal Pin Signal Pin Signal

1

2

3

4

5

6

7

8

9

10

11

12

13

14

Reset

Ground

DD7

DD8

DD6

DD9

DD5

DD10

DD4

DD11

DD3

DD12

DD2

DD13

15

16

17

18

19

20

21

22

23

24

25

26

27

28

DD1

DD14

DD0

DD15

Ground

(Key)

DMARQ

Ground

DIOW

Ground

DIOR

Ground

IORDY

CSEL

29

30

31

32

33

34

35

36

37

38

39

40

DMAK

Ground

INTRQ

IOCS16

DA1

PDIAG (cable detect)

DA0

DA2

CS1FX

CS3FX

DASP

Ground

74 Appendix A Connector Pin Assignments

CD-ROM 50-Pin Connector

Connector

Pin Signal Pin Signal Pin Signal Pin Signal

1

2

3

4

5

6

7

8

9

Audio L-ch

Audio R-ch

Audio GND

GND

RESET

DD8

DD7

DD9

DD6

14

15

16

17

18

19

20

21

22

DD12

DD3

DD13

DD2

DD14

DD1

DD15

DD0

DMARQ

27

28

29

30

31

32

33

34

35

IORDY

DMACK

INTRQ

IOCS16

DA1

PDIAG

DA0

DA2

CS1FX

40

41

42

43

44

45

46

47

48

+5V

+5V

+5V

GND

GND

GND

GND

CSEL

GND

10

DD10

11

DD5

12

DD11

13

DD4

24-Pin Power

Connector

24

12

Pin Signal Pin Signal Pin Signal Pin Signal

1

+3.3V

2

+3.3V

3

GND

4

+5V

23

24

25

26

7

8

9

10

GND

DIOR

DIOW

GND

13

1

GND

POK

+5 Vaux

+12V

Front

36

37

38

39

13

14

15

16

CS3FX

DASP

+5V

+5V

+3.3V

–12V

GND

PSON

49

50

19

20

21

22

Vendor-specific

Vendor-specific

GND

open

+5V

+5V

5

GND

6

+5V

11

12

+12V

+3.3V

17

18

GND

GND

23

24

+5V

GND

CD-ROM 50-Pin Connector 75

24-Pin MicroFit Power

Connector

24

12

Pin Signal Pin Signal Pin Signal Pin Signal

1

+5 Vaux

2

GND

3

+5V

4

+5V

5

PS_ON

6

GND

7

8

9

10

11

12

4-Pin Power (for CPU)

Connector and Icon Pin Signal

13

1

PWRGD

+3.3V

+3.3V

Tach

GND

Fan-CMD

Front

13

14

15

16

17

18

+12V

+5V Sense

GND

+5V

+5V

+3.3V

1

2

GND

GND

19

20

21

22

23

24

GND

+3.3V

Sense

+3.3V

+3.3V

GND

6-Pin Power (for CPU)

Connector and Icon Pin Signal

4

6

3

4

1

2

3

4

5

6

+12V CPU

-12V CPU

GND

GND

GND

12V CPU

12V CPU

+12V

76 Appendix A Connector Pin Assignments

SATA Data and Power

Drive Connector

Pin Signal Pin Signal Pin Signal Pin Signal

S1S5Ground

B-

P1

Ground

P5

B-

P9

V 5

P13

V 12

S = Data, P = Power

PCI Express

x1, x4, x8, and x16 PCI Express Connector

Pin A

S2S6A+

B+

P2

V 3.3

P6

Ground

P10

Ground

P14

V12

S3S7A-

P3

P7

P11

P15

Ground

V 3.3

V 5

Reserved

V 12

S4 Ground

P4

Ground

P8

V 5

P12

Ground

Pin

Signal Pin Signal Pin Signal Pin Signal Pin Signal

1

PRSNT1

2

+12V

3

+12V

4

GND

5

JTAG2

26

PERn(2)

27

GND

28

GND

29

PERp3

30

PERn3

51 GND 56 PERp9 61 PERn10 66 GND 71 GND

6

7

8

9

10

31

32

33

34

35

JTAG3

JTAG4

JTAG5

+3.3V

+3.3V

GND

RSVD

RSVD

GND

PERp4

11

12

13

14

15

36

37

38

39

40

PERST#

GND

REFCLK+

REFCLK-

GND

PERn4

GND

GND

PERp5

PERn5

16

17

18

19

20

41

42

43

44

45

PERp0

PERn0

GND

RSVD

GND

GND

GND

PERp6

PERn6

GND

21

22

23

24

25

46

47

48

49

50

PERp1

PERn1

GND

GND

PERp2

GND

PERp7

PERn7

GND

RSVD

SATA Data and Power 77

52

PERp8

53

PERN8

54

GND

55

GND

76

PERp14

77

PERn14

78

GND

79

GND

80

PERp15

NOTE: x1 PCI Express uses pins 1-18

x4 PCI Express uses pins 1-32

x8 PCI Express uses pins 1-49

x16 PCI Express uses pins 1-8

PCI Express

57

PERn9

58

GND

59

GND

60

PERp10

8182PERn15

GND

62

GND

63

GND

64

PERp11

65

PERn11

67

68

69

70

GND

PERp12

PERn12

GND

72

73

74

75

PERp13

PERn13

GND

GND

x1, x4, x8, and x16 PCI Express Connector

Pin B

Pin

Signal Pin Signal Pin Signal Pin Signal Pin Signal

1

2

3

4

5

26

27

28

29

+12V

+12V

RSVD

GND

SMCLK

GND

PETp3

PETn3

GND

6

7

8

9

10

31

32

33

34

SMDAT

GND

+3.3 V

JTAG1

3.3vAux

PRSNT2#

GND

PETp4

PETn4

11

12

13

14

15

36

37

38

39

WAKE#

RSVD

GND

PETp0

PETn0

GND

PETp5

PETn5

GND

16

17

18

19

20

41

42

43

44

GND

GND

GND

PETp1

PETn1

PETp6

PRTn6

GND

GND

21

22

23

24

25

46

47

48

49

GND

GND

PETp2

PETn2

GND

PETn7

GND

PRSNT2#

GND

30

RSVD

51 PETn8 56 GND 61 GND 66 PETp12 71 PETn13

35

GND

78 Appendix A Connector Pin Assignments

40

GND

45

PETp7

50

PETp8

52

GND

53

GND

54

PETp9

55

PETn9

76

GND

77

GND

78

PETp15

79

PETn15

80

GND

NOTE: x1 PCI Express uses pins 1-18

x4 PCI Express uses pins 1-32

x8 PCI Express uses pins 1-49

x16 PCI Express uses pins 1-8

57

GND

58

PETp10

59

PETn10

60

GND

8182PRSNT2#

RSVD

PCI Express Mini Card

62

PETp11

63

PETn11

64

GND

65

GND

67

68

69

70

PETn12

GND

GND

PETp13

72

73

74

75

GND

GND

PETp14

PETn14

PCI Express Mini Card Connector

Pin Signal Pin Signal Pin Signal Pin Signal Pin Signal

1

2

3

4

5

6

WAKE#

3.3V

Reserved**

GND

Reserved**

1.5V

7

8

9

10

11

12

CLKREQ#

UIM_PWR

GND

UIM_DATA

REFCLK-

UIM_CLK

13

14

15

16

17

18

REFCLK+

UIM_RESET

GND

UIM_VPP

Reserved ***
(UIM_C8)

GND

19

20

21

22

23

24

Reserved***
(UIM_C4)

W_DISABLE#

GND

PERST#

PERn0

+3.3Vaux

25

26

27

28

29

30

PERp0

GND

GND

+1.5V

GND

SMB_CLK

PCI Express Mini Card 79

31

PETn0

32

SMB_DATA

33

PETp0

34

GND

36

GND

36

USB_D-

NOTE: *Reserved for future second PCI Express LAN (if needed)

**Reserved for future wireless coexistence control interface (if needed)

***Reserved for future UIM interface (if needed)

DVI Connector

Connector and Icon

37

38

39

40

41

42

Reserved*

USB_D+

Reserved*

GND

Reserved*

LED_WWAN#

43

44

45

46

47

48

Reserved*

LED_WLAN#

Reserved*

LED_WPAN#

Reserved*

+1.5V

49

50

51

52

Reserved*

GND

Reserved*

+3.3V

Pin Signal Pin Signal

1

2

3

4

5

6

7

8

9

10

11

12

T.M.D.S. Data2–

T.M.D.S. Data2+

T.M.D.S. Data2/4 Shield

T.M.D.S. Data4–

T.M.D.S. Data4+

DDC Clock

DDC Data

No Connect

T.M.D.S. Data1–

T.M.D.S. Data1+

T.M.D.S. Data1/3 Shield

T.M.D.S. Data3–

13

14

15

16

17

18

19

20

21

22

23

24

T.M.D.S. Data3+

+5V Power

Ground (for +5V)

Hot Pug Detect

T.M.D.S. Data0–

T.M.D.S. Data0+

T.M.D.S. Data0/5 Shield

T.M.D.S. Data5–

T.M.D.S. Data5+

T.M.D.S. Data Shield

T.M.D.S. Clock+

T.M.D.S. Clock-

80 Appendix A Connector Pin Assignments

B Power Cord Set Requirements

The power supplies on some computers have external power switches. The voltage select switch feature
on the computer permits it to operate from any line voltage between 100-120 or 220-240 volts AC. Power
supplies on those computers that do not have external power switches are equipped with internal
switches that sense the incoming voltage and automatically switch to the proper voltage.

The power cord set received with the computer meets the requirements for use in the country where
you purchased the equipment.

Power cord sets for use in other countries must meet the requirements of the country where you use
the computer.

General Requirements

The requirements listed below are applicable to all countries:

1. The power cord must be approved by an acceptable accredited agency responsible for evaluation

in the country where the power cord set will be installed.

2. The power cord set must have a minimum current capacity of 10A (7A Japan only) and a nominal

voltage rating of 125 or 250 volts AC, as required by each country’s power system.

3. The diameter of the wire must be a minimum of 0.75 mm

must be between 1.8 m (6 feet) and 3.6 m (12 feet).

The power cord should be routed so that it is not likely to be walked on or pinched by items placed upon
it or against it. Particular attention should be paid to the plug, electrical outlet, and the point where the
cord exits from the product.

WARNING! Do not operate this product with a damaged power cord set. If the power cord set is

damaged in any manner, replace it immediately.

Japanese Power Cord Requirements

For use in Japan, use only the power cord received with this product.

CAUTION: Do not use the power cord received with this product on any other products.

or 18AWG, and the length of the cord

2

General Requirements 81

Country-Specific Requirements

Additional requirements specific to a country are shown in parentheses and explained below.

Country Accrediting Agency Country Accrediting Agency

Australia (1)

Austria (1)

Belgium (1)

Canada (2)

Denmark (1)

Finland (1)

France (1)

Germany (1)

1. The flexible cord must be Type HO5VV-F, 3-conductor, 0.75mm2 conductor size. Power cord set fittings (appliance coupler

and wall plug) must bear the certification mark of the agency responsible for evaluation in the country where it will be used.

2. The flexible cord must be Type SVT or equivalent, No. 18 AWG, 3-conductor. The wall plug must be a two-pole grounding

type with a NEMA 5-15P (15A, 125V) or NEMA 6-15P (15A, 250V) configuration.

3. Appliance coupler, flexible cord, and wall plug must bear a “T” mark and registration number in accordance with the

Japanese Dentori Law. Flexible cord must be Type VCT or VCTF, 3-conductor, 0.75 mm
be a two-pole grounding type with a Japanese Industrial Standard C8303 (7A, 125V) configuration.

EANSW

OVE

CEBC

CSA

DEMKO

SETI

UTE

VDE

Italy (1)

Japan (3)

Norway (1)

Sweden (1)

Switzerland (1)

United Kingdom (1)

United States (2)

IMQ

METI

NEMKO

SEMKO

SEV

BSI

UL

conductor size. Wall plug must

2

82 Appendix B Power Cord Set Requirements

C Troubleshooting

Safety and Comfort

WARNING! Misuse of the computer or failure to establish a safe and comfortable work environment

may result in discomfort or serious injury. Refer to the Safety & Comfort Guide available on the Web

http://www.hp.com/ergo for more information on choosing a workspace and creating a safe and

site at
comfortable work environment.

WARNING! Energized and moving parts inside.

Disconnect power to the equipment before removing the enclosure.

Replace and secure the enclosure before re-energizing the equipment.

Before You Call for Technical Support

If you are having problems with the computer, try the appropriate solutions below to try to isolate the
exact problem before calling for technical support.

Run the HP diagnostic tool.

●

Run the hard drive self-test in Computer Setup. Refer to

●

for more information.

Listen for a series of beeps from the computer. The beeps are error codes that will help you

●

diagnose the problem. Refer to
codes.

If the screen is blank, plug the monitor into a different video port on the computer if one is available.

●

Or, change out the monitor with a monitor that you know is functioning properly.

If you are working on a network, plug another computer with a different cable into the network

●

connection. There may be a problem with the network plug or cable.

If you recently added new hardware, remove the hardware and see if the computer functions

●

properly.

If you recently installed new software, uninstall the software and see if the computer functions

●

properly.

Boot the computer to the Safe Mode to see if it will boot without all of the drivers loaded. When

●

booting the operating system, use “Last Known Configuration.”

Interpreting POST Audible Codes on page 90 to interpret the

Computer Setup (F10) Utility on page 3

Refer to the comprehensive online technical support at

●

●

Refer to

Helpful Hints on page 84 in this guide for more general suggestions.

http://www.hp.com/support.

Safety and Comfort 83

To assist you in resolving problems online, HP Instant Support Professional Edition provides you with
self-solve diagnostics. If you need to contact HP support, use HP Instant Support Professional Edition's
online chat feature. Access HP Instant Support Professional Edition at:

http://www.hp.com/go/ispe.

Access the Business Support Center (BSC) at
support information, software and drivers, proactive notification, and worldwide community of peers and
HP experts.

If it becomes necessary to call for technical assistance, be prepared to do the following to ensure that
your service call is handled properly:

Be in front of your computer when you call.

●

Write down the computer serial number and product ID number, and the monitor serial number

●

before calling.

Spend time troubleshooting the problem with the service technician.

●

Remove any hardware that was recently added to your system.

●

Remove any software that was recently installed.

●

NOTE: For sales information and warranty upgrades (Care Packs), call your local authorized service

provider or dealer.

Helpful Hints

If you encounter problems with the computer, monitor, or software, see the following list of general
suggestions before taking further action:

http://www.hp.com/go/bizsupport for the latest online

Check that the computer and monitor are plugged into a working electrical outlet.

●

Check to see that the voltage select switch (some models) is set to the appropriate voltage for your

●

region (115V or 230V).

Check to see that the computer is turned on and the power light is on.

●

Check to see that the monitor is turned on and the green monitor light is on.

●

Turn up the brightness and contrast controls of the monitor if the monitor is dim.

●

Press and hold any key. If the system beeps, then the keyboard should be operating correctly.

●

Check all cable connections for loose connections or incorrect connections.

●

Wake the computer by pressing any key on the keyboard or pressing the power button. If the system

●

remains in suspend mode for more than four seconds, shut down the computer by pressing and
holding the power button for at least four seconds then press the power button again to restart the
computer. If the system will not shut down, unplug the power cord, wait a few seconds, then plug
it in again. The computer will restart if automatic start on power loss is set in Computer Setup. If it
does not restart, press the power button to start the computer.

Reconfigure your computer after installing a non–plug and play expansion board or other option.

●

Be sure that all the needed device drivers have been installed. For example, if you are using a

●

printer, you need a driver for that model printer.

Remove all bootable media (diskette, CD, or USB device) from the system before turning it on.

●

84 Appendix C Troubleshooting

If you have installed an operating system other than the factory-installed operating system, check

●

to be sure that it is supported on the system.

If the system has multiple video sources (embedded, PCI, or PCI-Express adapters) installed and

●

a single monitor, the monitor must be plugged into the monitor connector on the source selected
as the primary VGA adapter. During boot, the other monitor connectors are disabled and if the
monitor is connected into these ports, the monitor will not function. You can select which source
will be the default VGA source in Computer Setup.

CAUTION: When the computer is plugged into an AC power source, there is always voltage 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.

Solving General Problems

You may be able to easily resolve the minor problems described in this section. If a problem persists
and you are unable to resolve it yourself or if you feel uncomfortable about performing the operation,
contact your HP authorized reseller or service provider.

Computer will not turn on.

Cause Solution

Cables to the external power source are unplugged. Ensure that cables connecting the computer to the external

power source are plugged in properly and the wall outlet is
active.

Voltage selector switch on rear of computer chassis (some
models) not switched to correct line voltage (115V or 230V).

A defective PCI card has been installed. Remove any expansion board that was just installed.

Drive data or power supply cables may not be properly
connected.

The unit temperature was exceeded. The fan may be blocked. 1. Unit is in an exceedingly hot environment. Let it cool

Computer appears locked up and will not turn off when the power button is pressed.

Cause

Software control of the power switch is not functional. 1. Press and hold the power button for at least four seconds

Computer will not respond to USB keyboard or mouse.

Select the proper AC voltage using the selector switch.

Reseat drive data and power supply cables.

down.

2. Ensure that computer air vents are not blocked and the

internal fan is running.

3. Contact an HP authorized reseller or service provider.

Solution

until the computer turns off.

2. Disconnect the power cord from the electrical outlet.

Cause Solution

System has locked up. Restart computer.

Solving General Problems 85

Computer will not respond to USB keyboard or mouse.

Cause Solution

Keyboard or mouse is not connected to computer. Connect keyboard and mouse cables to computer.

Computer is in standby mode. To resume from standby mode, press the power button or

press any key.

CAUTION: When attempting to resume from standby mode,

do not hold down the power button for more than four seconds.
Otherwise, the computer will shut down and you will lose any
unsaved data.

Computer date and time display is incorrect.

Cause

RTC (real-time clock) battery may need to be replaced.

NOTE: Connecting the computer to a live AC outlet prolongs

the life of the RTC battery.

Cursor will not move using the arrow keys on the keypad.

Cause Solution

The Num Lock key may be on. Press the Num Lock key. The Num Lock light should not be on

Poor performance is experienced.

Cause Solution

Processor is hot. 1. Make sure airflow to the computer is not blocked. Leave

Solution

First, reset the date and time under Control Panel (Computer
Setup can also be used to update the RTC date and time). If
the problem persists, replace the RTC battery. See the
Hardware Reference Guide for instructions on installing a new
battery, or contact an authorized dealer or reseller for RTC
battery replacement.

if you want to use the arrow keys. The Num Lock key can be
disabled (or enabled) in Computer Setup.

a 10.2-cm (4-inch) clearance on all vented sides of the
computer and above the monitor to permit the required
airflow.

Hard drive is full. Transfer data from the hard drive to create more space on the

Low on memory. Add more memory.

Hard drive fragmented. Defragment hard drive.

Program previously accessed did not release reserved
memory back to the system.

Virus resident on the hard drive. Run virus protection program.

86 Appendix C Troubleshooting

2. Make sure fans are connected and working properly

(some fans only operate when needed).

3. Make sure the processor heatsink is installed properly.

hard drive.

Restart the computer.

Poor performance is experienced.

Cause Solution

Too many applications running. 1. Close unnecessary applications to free up memory.

Some applications run in the background and can be
closed by right-clicking on their corresponding icons in the
task tray. To prevent these applications from launching at
startup, go to Start > Run (Microsoft Windows XP) or
Start > All Programs > Accessories > Run (Microsoft
Windows Vista) and type msconfig. On the Startup tab
of the System Configuration Utility, uncheck applications
that you do not want to launch automatically.

CAUTION: Do not prevent applications from launching

at startup that are required for proper system operation.

2. Add more memory.

Some software applications, especially games, are stressful
on the graphics subsystem

Cause unknown. Restart the computer.

Blank screen (no video).

Cause Solution

Monitor is not turned on and the monitor light is not on. Turn on the monitor and check that the monitor light is on.

The cable connections are not correct. Check the cable connection from the monitor to the computer

You may have a screen blanking utility installed or energy
saver features are enabled.

Computer is in standby mode. Press the power button to resume from standby mode.

1. Lower the display resolution for the current application or

consult the documentation that came with the application
for suggestions on how to improve performance by
adjusting parameters in the application.

2. Add more memory.

3. Upgrade the graphics solution.

and to the electrical outlet.

Press any key or click the mouse button and, if set, type your
password.

CAUTION: When attempting to resume from standby mode,

do not hold down the power button for more than four seconds.
Otherwise, the computer will shut down and you will lose any
unsaved data.

You are using a fixed-sync monitor and it will not sync at the
resolution chosen.

Monitor cable is plugged into the wrong connector. Ensure that the monitor is plugged into an active connector on

Bad monitor. Try a different monitor.

Be sure that the monitor can accept the same horizontal scan
rate as the resolution chosen.

the rear of the computer. If another connector is available,
connect the monitor to that connector and reboot the system.

Solving General Problems 87

Computer is beeping and will not start.

Cause Solution

Internal error has occurred and the computer is beeping a
code.

Refer to Interpreting POST Audible Codes on page 90 to
interpret the error code.

Solving Hardware Installation Problems

You may need to reconfigure the computer when you add or remove hardware, such as an additional
drive or expansion card. If you install a plug and play device, the Windows operating system
automatically recognizes the device and configures the computer. If you install a non–plug and play
device, you must reconfigure the computer after completing installation of the new hardware. In the
Windows operating system, use the Add Hardware Wizard and follow the instructions that appear on
the screen.

WARNING! When the computer is plugged into an AC power source, voltage is always applied to the

system board. To reduce the risk of personal injury from electrical shock, rotating fans, and/or hot
surfaces, be sure to disconnect the power cord from the wall outlet and allow the internal system
components to cool before touching.

Look for the LED on the system board. If the LED is illuminated, the system still has power. Power off
the computer and remove the power cord before proceeding.

A new device is not recognized as part of the system.

Cause Solution

Device is not seated or connected properly. Ensure that the device is properly and securely connected and

that pins in the connector are not bent down.

Cable(s) of new external device are loose or power cables are
unplugged.

Power switch of new external device is not turned on. Turn off the computer, turn on the external device, then turn on

When the system advised you of changes to the configuration,
you did not accept them.

A plug and play board may not automatically configure when
added if the default configuration conflicts with other devices.

USB ports on the computer are disabled in Computer Setup. Enter Computer Setup (F10) and enable the USB ports.

Ensure that all cables are properly and securely connected and
that pins in the cable or connector are not bent down.

the computer to integrate the device with the computer system.

Reboot the computer and follow the instructions for accepting
the changes.

Use Windows Device Manager to deselect the automatic
settings for the board and choose a basic configuration that
does not cause a resource conflict. You can also use Computer
Setup to reconfigure or disable devices to resolve the conflict.

88 Appendix C Troubleshooting

Computer will not start.

Cause Solution

Wrong memory modules were used in the upgrade or memory
modules were installed in the wrong location.

1. Review the documentation that came with the system to

determine if you are using the correct memory modules
and to verify the proper installation.

2. Listen for beeps from the computer. See

POST Audible Codes on page 90 to determine possible

causes.

3. If you still cannot resolve the issue, contact Customer

Support.

Interpreting

Solving Hardware Installation Problems 89

Interpreting POST Audible Codes

This section covers the audible codes that may occur before or during POST that do not necessarily
have an error code or text message associated with them.

WARNING! When the computer is plugged into an AC power source, voltage is always applied to the

system board. To reduce the risk of personal injury from electrical shock and/or hot surfaces, be sure
to disconnect the power cord from the wall outlet and allow the internal system components to cool
before touching.

Beeps Meaning Recommended Action

1 short beep and 1 long beep
followed by a three second
pause

2 short beeps and 1 long beep
followed by a three second
pause

3 short beeps and 1 long beep
followed by a three second
pause

1 short beep followed by a one
second pause

2 short beeps followed by a
three second pause

3 short beeps followed by a
three second pause

Bad memory or memory configuration
error.

No graphics card installed or graphics
card initialization failed.

CPU configuration error or invalid CPU
detected before graphics card initialized.

No legacy floppy drive or optical drive
found.

No floppy diskette or CD found. 1. Check the type of drive that you are using

Flashing not ready (missing utility or
BIOS image file, etc.)

Check that the memory modules have been
installed correctly and that proper modules are
used.

For systems with a graphics card:

1. Reseat the graphics card. Power on the

system.

2. Replace the graphics card.

3. Replace the system board.

For systems with integrated graphics, replace the
system board.

1. Upgrade the BIOS to proper version.

2. Change the processor.

1. Check cable connections.

2. Run the Computer Setup utility and ensure

the device port is enabled.

and use the correct media type.

2. Replace the diskette or CD with a new one.

Upgrade the BIOS to proper version.

4 short beeps followed by a
three second pause

5 short beeps followed by a
three second pause

90 Appendix C Troubleshooting

Flashing operation has failed (checksum
error, corrupted image, etc.)

BIOS recovery was successful No action required.

1. Verify the correct ROM.

2. Flash the ROM if needed.

3. If an expansion board was recently added,

remove it to see if the problem remains.

4. Clear CMOS.

5. If the message disappears, there may be a

problem with the expansion card.

6. Replace the system board.

Contacting Customer Support

For help and service, contact an authorized reseller or dealer. To locate a reseller or dealer near you,

http://www.hp.com.

visit

NOTE: If you take the computer to an authorized reseller, dealer, or service provider for service,

remember to provide the setup and power-on passwords if they are set.

Refer to the number listed in the warranty or in the Support Telephone Numbers guide for technical
assistance.

Contacting Customer Support 91

D System Board and Riser Board

Reference Designators

These reference designators are used on most but not all HP system and riser boards.

Designator Component

BAT

CR1

CR2

CR3

CR4

CR35

E14

E15

E16

E25

E49/JP49

E50

J7

J9

J10

J11

Battery socket/Battery

LED - 5V_Aux (on)

Health-LED

UID LED

Power LED

Hard drive activity LED

Boot block header/jumper

Boot block recovery header

ROM recovery header

CPLD programming header

Clear Password header/jumper

Clear CMOS header

RJ45 jack

Stacked RJ45/Dual USB

Quad stacked USB

First IEEE 1394 connector

J12

J13

J14

J20 - 29

J30

J31 - J35

J37

Second IEEE 1394 connector

SPDIF input

SPDIF output

PCI slots

PCI extender slot (male)

PCI Express slots

Primary SCSI connector

92 Appendix D System Board and Riser Board Reference Designators

J38

Secondary SCSI connector

J39

J40

J41

J50

J51

J52

J53

J54

J55

J65

J66

J67

J68

J69

J70

J71

Stacked parallel/SCSI connector

AGP slot

x16 PCI Express slot for graphics

First parallel port

Second parallel port

Double-stacked parallel port, Top = Port B, Bottom = Port A

Parallel port over single Serial Port

Parallel port over Serial Port and Video Port

Parallel port over dual VGA ports

DVI connector

Keyboard connector, PS/2 (Closest to power supply)

Mouse connector, PS/2

Stacked mouse (Top)/keyboard (Bottom) connector

Video connector, VGA

Primary single USB connector

Secondary single USB port

J72

J73

J74

J75

J76

J77

J78

J80

J81

J82

J83

J101

J9020-J9029

J9030-J9034

JP49/E49

L1

Microphone jack

Line-in jack

Line-out jack

Headphone jack

Volume control

Double-stacked headphone (Bottom)/microphone (Top) connector

Double-stacked line-in (Top)/line-out (Bottom) connector

Stacked serial/audio connector

Primary double-stack USB, Top = Port 2, Bottom = Port 1

Secondary double-stack USB, Top = Port 4, Bottom = Port 3

Triple-stacked audio jack (line in, line out/headphone, microphone)

Security board connector - for security card

PCI slots on riser card

PCI express slots on riser card

Clear password header/jumper

USB front port choke (1st)

L2 USB rear port choke (1st)

93

L3

USB rear port choke (2nd)

L4

L5

P1

P2

P3

P4

P5

P6

P7

P8

P9

P10

P11

P12

P13

P15

USB rear port choke (3rd)

USB front port choke (2nd)

P/S connector (20 or 24 pin)

Second P/S connector (as required)

Processor 12V header

Secondary Processor 12V header

Main Power/HDD LED connector

Speaker connector

Analog audio connector (from CD-ROM)

Primary chassis fan header or primary CPU heatsink fan

Secondary chassis fan header

Diskette drive connector

Auxiliary Audio connector

Alert on LAN connector

VRM module footprint

AUI connector

P16

P17

P18

P19

P20

P21

P22

P23

P24

P25

P26

P27

P29

P30

P40

P41

Fan command/fan sink header (may be 2 or 4 pin)

Digital audio expansion header

SPDIF internal input header

SPDIF internal output header

Primary IDE connector

Secondary IDE/MultiBay connector

Header for NEWCARD

Header for front panel audio

Header for front panel USB

Internal USB connector 1

Internal USB connector 2

MultiBay header

SCSI LED connector

PCI extender slot (female)

Blade PC graphics connector (outboard)

Blade PC graphics connector (inboard)

P52

Second serial port

94 Appendix D System Board and Riser Board Reference Designators