HP dx2420 Service & Reference Manual

Service Reference Guide

HP Compaq dx2420 Business PC

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 2009)

Document Part Number: 571399-001

Table of contents

1 Installing and Customizing the Software

Installing and Customizing the Software .............................................................................................. 1

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

Downloading Microsoft Windows Updates .......................................................................... 1

Installing or Upgrading Device Drivers ................................................................................ 2

Customizing the Monitor Display ......................................................................................... 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 ..................................................................................................... 7

Computer Setup—Boot ........................................................................................................ 8

Computer Setup—Exit ......................................................................................................... 8

Recovering the Configuration Settings ................................................................................................. 9

3 Computer Diagnostic Features

HP Insight Diagnostics ....................................................................................................................... 10

Accessing HP Insight Diagnostics ..................................................................................... 10

Survey Tab ........................................................................................................................ 11

Test Tab ............................................................................................................................. 12

Status Tab ......................................................................................................................... 12

Log Tab .............................................................................................................................. 13

Help Tab ............................................................................................................................ 13

Saving and Printing Information in HP Insight Diagnostics ................................................ 14

Downloading the Latest Version of HP Insight Diagnostics ............................................... 14

Protecting the Software ...................................................................................................................... 14

HP Backup and Recovery Manager ................................................................................................... 15

4 Serial and Parallel ATA Drive Guidelines and Features

SATA Hard Drives .............................................................................................................................. 16

SATA Hard Drive Cables .................................................................................................................... 17

iii

SATA Data Cable .............................................................................................................. 17

SATA Power Cable ............................................................................................................ 17

PATA Device Information ................................................................................................................... 18

ATA SMART Drives ............................................................................................................................ 18

Hard Drive Capacities ........................................................................................................................ 18

5 Identifying the Chassis, Routine Care, and Disassembly Preparation

Chassis Designation ........................................................................................................................... 19

Microtower (MT) ................................................................................................................. 19

Electrostatic Discharge Information .................................................................................................... 20

Generating Static ............................................................................................................... 20

Preventing Electrostatic Damage to Equipment ................................................................ 20

Personal Grounding Methods and Equipment ................................................................... 21

Grounding the Work Area .................................................................................................. 21

Recommended Materials and Equipment .......................................................................... 21

Operating Guidelines .......................................................................................................................... 22

Routine Care ...................................................................................................................................... 23

General Cleaning Safety Precautions ................................................................................ 23

Cleaning the Computer Case ............................................................................................ 23

Cleaning the Keyboard ...................................................................................................... 23

Cleaning the Monitor .......................................................................................................... 24

Cleaning the Mouse ........................................................................................................... 24

Service Considerations ...................................................................................................................... 24

Power Supply Fan ............................................................................................................. 24

Tools and Software Requirements .................................................................................... 24

Screws ............................................................................................................................... 25

Cables and Connectors ..................................................................................................... 25

Hard Drives ........................................................................................................................ 25

Lithium Coin Cell Battery ................................................................................................... 26

6 Removal and Replacement Procedures Microtower (MT) Chassis

Serial Number Location ...................................................................................................................... 27

Preparation for Disassembly .............................................................................................................. 28

External Security Devices .................................................................................................................. 29

Cable Lock ......................................................................................................................... 29

Padlock .............................................................................................................................. 29

HP Business PC Security Lock .......................................................................................... 30

Computer Access Panel ..................................................................................................................... 32

Front Bezel ......................................................................................................................................... 33

Removing Bezel Blanks ..................................................................................................................... 34

Cable Management ............................................................................................................................ 35

Cable Connections ............................................................................................................ 36

Memory .............................................................................................................................................. 37

Expansion Cards ................................................................................................................................ 40

Drives ................................................................................................................................................. 44

System Board Drive Connections ...................................................................................... 46

Drive Positions ................................................................................................................... 47

Removing an Optical Drive ................................................................................................ 48

Installing an Optical Drive into the 5.25-inch Drive Bay ..................................................... 49

Removing an External 3.5-inch Drive ................................................................................ 50

Installing a Drive into the 3.5-inch External Drive Bay ....................................................... 51

Removing an Internal 3.5-inch Hard Drive ......................................................................... 53

Installing an Internal 3.5-inch Hard Drive ........................................................................... 55

Front USB Panel ................................................................................................................................ 58

Power Switch/LED Assembly ............................................................................................................. 59

Heat sink ............................................................................................................................................ 60

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

Rear Chassis Fan ............................................................................................................................... 62

Power Supply ..................................................................................................................................... 63

System Board ..................................................................................................................................... 64

Battery ................................................................................................................................................ 65

Type 1 Battery Holder ........................................................................................................ 66

Type 2 Battery Holder ........................................................................................................ 66

Type 3 Battery Holder ........................................................................................................ 67

Appendix A Connector Pin Assignments

Keyboard ............................................................................................................................................ 68

Mouse ................................................................................................................................................. 68

Ethernet RJ-45 ................................................................................................................................... 69

Parallel Interface ................................................................................................................................ 69

Serial Interface, Powered and Non-Powered ..................................................................................... 70

USB .................................................................................................................................................... 70

Microphone ......................................................................................................................................... 70

Headphone ......................................................................................................................................... 70

Line-in Audio ...................................................................................................................................... 71

Line-out Audio .................................................................................................................................... 71

Monitor ............................................................................................................................................... 71

24-Pin Power ...................................................................................................................................... 72

4-Pin Power (for CPU) ........................................................................................................................ 72

SATA Data and Power ....................................................................................................................... 72

PCI Express ...................................................................................................................................... 73

PCI Express ....................................................................................................................................... 74

PCI Express Mini Card ....................................................................................................................... 75

Appendix B Power Cord Set Requirements

General Requirements ....................................................................................................................... 76

Japanese Power Cord Requirements ................................................................................................ 76

Country-Specific Requirements .......................................................................................................... 77

Appendix C Troubleshooting

Safety and Comfort ............................................................................................................................ 78

Before You Call for Technical Support ............................................................................................... 78

Helpful Hints ....................................................................................................................................... 79

Solving General Problems .................................................................................................................. 80

Solving Hardware Installation Problems ............................................................................................. 83

Interpreting POST Audible Codes ...................................................................................................... 85

Contacting Customer Support ............................................................................................................ 86

Appendix D Specifications

Index ................................................................................................................................................................... 89

1 Installing and Customizing the Software

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.

Downloading Microsoft Windows Updates

1. To set up your Internet connection, click Start > Internet Explorer and follow the instructions on

the screen.

2. Once an Internet connection has been established, click the Start button.

3. Select the All Programs menu.

4. Click on the Windows Update link.

In Windows Vista, the Windows Update screen appears. Click view available updates and make sure all critical updates are selected. Click the Install button and follow the instructions on the screen.

Installing and Customizing the Software 1

In Windows XP, you will be directed to the Microsoft Windows Update Web site. If you see one or more pop-up windows that ask you to install a program from

http://www.microsoft.com, click

Yes to install the program. Follow the instructions on the Microsoft Web site to scan for updates and install critical updates and service packs.

It is recommended that you install all of the critical updates and service packs.

5. After the updates have been installed, Windows will prompt you to reboot the machine. Be sure to

save any files or documents that you may have open before rebooting. Then select Yes to reboot the machine.

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.

Customizing the Monitor Display

If you wish, you can select or change the monitor model, refresh rates, screen resolution, color settings, font sizes, and power management settings. To do so, right-click on the Windows Desktop, then click Personalize in Windows Vista or Properties in Windows XP to change display settings. For more information, refer to the online documentation provided with the graphics controller utility or the documentation that came with your monitor.

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

4 Chapter 2 Computer Setup (F10) Utility

1st Drive

2nd Drive

3rd Drive

4th Drive

For each, allows you to:

●

(view only)

◦

Capacity (Size - HDD only)

◦

Transfer Mode

◦

SATA Speed

◦

NCQ

●

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

◦

SMART Status Check

◦

SMART Short Self-Test

◦

SMART Extended Self-Test

System Information (view only)

●

Installed Memory

●

Memory Bank 1

●

Memory Bank 2

●

Memory Bank 3

●

Memory Bank 4

●

BIOS Revision

●

Core Version

●

Model Number

●

Product Number

●

Asset Tag (press Enter to change)

NOTE: The model number is programmed by an external utility for the following models:

• HP Compaq dx2390 Microtower

• HP Compaq dx2400 Microtower

• HP Compaq dx2420 Microtower

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)

Table 2-1 Computer Setup—Main (continued)

Computer Setup (F10) Utilities 5

Cache RAM (view only)

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

system:

●

Integrated (Onboard)

●

PCI

●

PCI-Ex16

●

PCI-Ex1

DVMT Mode Select Allows you to set video memory mode to:

●

Fixed Mode

●

DVMT Mode

DVMT/Fixed Memory Allows you to set video memory size to:

●

128MB

●

256MB

●

Maximum DVMT (available for DVMT Mode only)

PS/2 Mouse Allows you to set:

●

Disabled

●

Enabled

●

Auto Detect

USB Legacy Mode Support

Allows you to set:

●

Disabled

●

Enabled

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

Onboard LAN Boot ROM

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

SATA1 Controller Allows you to disable/enable the SATA1 Controller.

SATA1 Controller Mode

If SATA1 Controller is enabled, allows you to set the mode to:

●

IDE

●

AHCI

SATA2 Controller Allows you to disable/enable the SATA2 Controller.

Onboard Audio Allows you to set the onboard audio to:

●

Auto

●

Disabled

●

Enabled

Internal Speaker Allows you to set the internal speaker to:

●

Disabled

●

Enabled

Table 2-2 Computer Setup—Advanced (continued)

6 Chapter 2 Computer Setup (F10) Utility

Supervisor Password Allows you to change supervisor password.

User Password Allows you to change the user password.

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:

●

Stay Off

●

Power On

●

Auto

XD Disables/enables XD bit.

Table 2-2 Computer Setup—Advanced (continued)

Computer Setup (F10) Utilities 7

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

Disables/enables POST diagnostic messages display.

1st Boot Device

2nd Boot Device

3rd Boot Device

4th Boot Device

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

●

Floppy Group

●

CD-ROM Group

●

Hard Drive Group

●

Network Boot Group

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

system has started.

Floppy Group Boot Priority

Specifies boot device priority within removable devices.

CD-ROM Group Boot Priority

Specifies boot device priority within CD/DVD drives.

Hard Drive Group Boot Priority

Specifies boot device priority within hard drives.

Network Group Boot Priority

Specifies boot device priority within bootable network devices.

ESC:Boot Menu Disables/enables the Esc key boot menu during POST.

F9:Diagnostics Disables/enables the F9 key diagnostics function during POST.

F10:Setup Disables/enables the F10 key computer setup function during POST.

F11:Recovery Disables/enables the F11 key system recovery function during POST.

F12:Boot from LAN Disables/enables the F12 key boot from LAN during POST.

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

Press Enter to exit discarding changes.

Load Setup Defaults Press Enter to load setup defaults.

8 Chapter 2 Computer Setup (F10) Utility

Discard Changes Press Enter to discard changes.

Save Changes Press Enter to save changes.

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.

Table 2-5 Computer Setup—Exit (continued)

Recovering the Configuration Settings 9

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

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

HP Insight Diagnostics on page 14 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.

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

10 Chapter 3 Computer Diagnostic Features

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

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

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 the Computer Setup (F10) Utility Guide for more information.

8. Select the appropriate language and click Continue.

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

unless you want to test your specific keyboard.

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

Diagnostics utility launches with the Survey tab displayed.

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:

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.

HP Insight Diagnostics 11

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:

●

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.

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

●

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.

To begin testing:

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

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.

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

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.

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

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.

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

and recommended actions.

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.

12 Chapter 3 Computer Diagnostic Features

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:

●

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

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

HP Insight Diagnostics 13

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.

14 Chapter 3 Computer Diagnostic Features

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

HP Backup and Recovery Manager 15

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.

16 Chapter 4 Serial and Parallel ATA Drive Guidelines and Features

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

SATA Hard Drive Cables 17

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

Maximum Size

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

18 Chapter 4 Serial and Parallel ATA Drive Guidelines and Features

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)

Figure 5-1 Microtower Configuration

Chassis Designation 19

Electrostatic Discharge Information

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

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

Generating Static

The following table shows that:

●

Different activities generate different amounts of static electricity.

●

Static electricity increases as humidity decreases.

Relative Humidity

Event

55% 40% 10%

Walking across carpet

Walking across vinyl floor

Motions of bench worker

Removing DIPs from plastic tube

7,500 V

3,000 V

400 V

15,000 V

5,000 V

800 V

700 V

35,000 V

12,000 V

6,000 V

2,000 V

Removing DIPs from vinyl tray

Removing DIPs from Styrofoam

Removing bubble pack from PCB

Packing PCBs in foam-lined box

2,000 V

3,500 V

7,000 V

5,000 V

4,000 V

5,000 V

20,000 V

11,000 V

11,500 V

14,500 V

26,500 V

21,000 V

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

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.

●

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.

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

●

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

Voltage

Antistatic plastic

Carbon-loaded plastic

Metallized laminate

1,500

7,500

15,000

Grounding the Work Area

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

●

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

●

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

●

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

●

Turn 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.

●

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

Electrostatic Discharge Information 21

●

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.

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

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 23 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 23 before cleaning the keyboard.

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

Cleaning the

Computer Case on page 23.

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

General Cleaning Safety Precautions

on page 23 before following these procedures:

WARNING! Use safety glasses equipped with side shields before attempting to clean debris from

under the keys.

CAUTION: Visible debris underneath or between the keys may be removed by vacuuming or shaking.

CAUTION: Canned, pressurized air may be used to clean debris from under the keys. Caution should

be used as too much air pressure can dislodge lubricants applied under the wide keys.

Routine Care 23

CAUTION: 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.

CAUTION: 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 Computer Case on page 23.

Cleaning the Mouse

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

●

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

●

To clean the mouse body, follow the procedures in

Cleaning the Computer Case on page 23.

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.

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

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

●

Diagnostics software

●

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

CAUTION: 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

Electrostatic Discharge Information on page 20

●

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.

Service Considerations 25

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.

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

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 cover of the computer. Keep these numbers available for use when contacting customer service for assistance.

Figure 6-1 Serial Number and Product ID Location

Serial Number Location 27

Preparation for Disassembly

See Identifying the Chassis, Routine Care, and Disassembly Preparation on page 19 for initial safety procedures.

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

External Security

Devices on page 29).

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.

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.

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

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

Figure 6-2 Installing a Cable Lock

Padlock

Figure 6-3 Installing a Padlock

External Security Devices 29

HP Business PC Security Lock

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

Figure 6-4 Securing the Cable to a Fixed Object

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

Figure 6-5 Threading the Keyboard and Mouse Cables

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

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

Figure 6-6 Attaching the Lock to the Chassis

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.

Figure 6-7 Engaging the Lock

External Security Devices 31

Computer Access Panel

1. Prepare the computer for disassembly (Preparation for Disassembly on page 28).

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.

NOTE: You may want to lay the computer on its side to install internal parts. Be sure the side

with the access panel is facing up.

Figure 6-8 Removing the Computer Access Panel

To install the access panel, reverse the removal procedure.

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

Front Bezel

1. Prepare the computer for disassembly (Preparation for Disassembly on page 28).

2. Remove the computer access panel (

Computer Access Panel on page 32).

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.

To reinstall the front bezel, reverse the removal procedure.

Front Bezel 33

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 the lower 5.25-inch bezel blank, gently twist and pull on the bezel blank until it breaks

free from the front bezel (1), then discard the bezel blank. If the blank needs to be replaced at a later date, you can order a replacement blank from HP.

3. To remove the 3.5-inch bezel blank, press the two retaining tabs towards the outer left edge of the

bezel (2) and pull the bezel blank inwards to free it from the front bezel (3).

Figure 6-9 Removing a Bezel Blank

4. Replace the front bezel.

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

Cable Management

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

●

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

●

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

●

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

●

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

●

Some flat ribbon cables come 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.

Cable Management 35

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

ATX1 white Power supply, 24-pin

JPW1 white Power supply, 4-pin

FDD1 black Diskette drive

CPU_FAN1 white Heat sink fan

SYS_FAN1 red Chassis fan

JFP1 black Front power button/LED

FUSB1 white Front I/O USB

FUSB2 white Media card reader

JAUD1 yellow Front I/O audio

DIMM1

DIMM2

blue

Memory slots

PCI1 white PCI 2.3 full-height slot

PCI_E1 black PCI Express X16 slot

PCI_E2 black PCI Express X1 slot

PCI_E3 black PCI Express X1 slot

U1 silver Processor

CMOS black with green cap Clear CMOS/password header

SATA0

SATA1

SATA2

SATA3

dark blue

white

light blue

orange

SATA drives

BAT1 black RTC battery

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

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 two 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:

●

industry-standard 240-pin

●

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

●

1.8 volt DDR2-SDRAM DIMMs

The DDR2-SDRAM DIMMs must also:

●

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

In addition, the computer supports:

●

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 two DIMM sockets on the system board, with one socket per channel. The sockets are labeled DIMM1 and DIMM2. Socket DIMM1 operates in memory channel A. Socket DIMM2 operates in memory channel B.

Memory 37

Figure 6-10 DIMM Socket Locations

Table 6-1 DIMM Socket Locations

Item Description Socket Color

1 DIMM1 socket, Channel A (populate first) Blue

2 DIMM2 socket, Channel B Blue

NOTE: A DIMM must occupy the DIMM1 socket.

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

●

The system will operate in single channel mode if the DIMM sockets are populated in one channel only.

●

The system will operate in a higher-performing dual channel mode if the memory capacity of the DIMM in Channel A is equal to the total memory capacity of the DIMM in Channel B.

●

The system will operate in flex mode if the memory capacity of the DIMM in Channel A is not equal to the memory capacity of the DIMM in Channel B. In flex mode, the channel populated with the least amount of memory describes the total amount of memory assigned to dual channel and the remainder is assigned to single channel. If one channel will have more memory than the other, the larger amount should be assigned to Channel A.

●

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

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

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 20 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 28).

2. Remove the computer access panel (

Computer Access Panel on page 32).

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.

In order to create a dual-channel memory configuration, the memory capacity of Channel A must equal the memory capacity of 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.

Memory 39

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.

Figure 6-11 Expansion Slot Locations

Table 6-2 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 (

Preparation for Disassembly on page 28).

2. Remove the computer access panel (

Computer Access Panel on page 32).

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

slot on the back of the computer chassis.

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

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.

Figure 6-12 Opening the Slot Cover Lock

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 flat blade 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.

Figure 6-13 Removing an Expansion Slot Cover

Expansion Cards 41

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.

Figure 6-14 Removing a Standard PCI Expansion Card

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.

Figure 6-15 Removing a PCI Express x16 Expansion Card

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.

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

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.

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.

Figure 6-16 Installing an Expansion Card

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.

Figure 6-17 Securing the Expansion Cards and Slot Covers

Expansion Cards 43

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

Computer Setup (F10) Utility on page 3 for

instructions on using Computer Setup.

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 SATA1.

●

Connect the first SATA optical drive to the white SATA connector on the system board labeled SATA2.

●

Always populate the dark blue SATA1 and white SATA2 connectors before the light blue SATA3 and orange SATA4 connectors.

●

Connect a second SATA optical drive to the orange SATA4 connector.

●

Connect additional SATA hard drives to the next available (unpopulated) SATA connector on the system board in the following order: SATA1, SATA2, SATA4, SATA3.

●

Connect a diskette drive to the connector labeled FDD1.

●

Connect a media card reader to the USB connector labeled JUSB2.

●

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

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

use M3 metric screws. The HP-supplied M3 metric guide screws (1) are black. The HP-supplied 6-32 standard screws (2) are silver.

Figure 6-18 Extra Drive Retainer Screws Location

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.”

Drives 45

System Board Drive Connections

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

Figure 6-19 System Board Drive Connections

Table 6-3 System Board Drive Connections

No. System Board Connector System Board Label Color

1 Media Card Reader JUSB2 white

2 Diskette Drive FDD1 black

3 SATA1 SATA1 dark blue

4 SATA3 SATA3 light blue

5 SATA2 SATA2 white

6 SATA4 SATA4 orange

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

Drive Positions

Figure 6-20 Drive Positions

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 to

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

Drives 47

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 (

Preparation for Disassembly on page 28).

2. Remove the computer access panel (

Computer Access Panel on page 32).

3. Remove the front bezel (

Front Bezel on page 33).

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

Figure 6-21 Disconnecting the Power and Data Cables

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

front of the chassis (2).

Figure 6-22 Removing the Optical Drive

48 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 (

Preparation for Disassembly on page 28).

2. Remove the computer access panel (

Computer Access Panel on page 32).

3. Remove the front bezel (

Front Bezel on page 33).

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

Removing Bezel Blanks on page 34 for more information.

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 two 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.

Figure 6-23 Installing the Optical Drive

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 49

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 28).

2. Remove the computer access panel (

Computer Access Panel on page 32).

3. Remove the front bezel (

Front Bezel on page 33).

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

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

back of the drive.

Figure 6-24 Disconnecting the Diskette Drive Cables

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

Figure 6-25 Disconnecting the Media Card Reader Cable

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 (

Preparation for Disassembly on page 28).

2. Remove the computer access panel (

Computer Access Panel on page 32).

3. Remove the front bezel (

Front Bezel on page 33).

Drives 51

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

Removing Bezel Blanks on page 34 for more

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.

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 two 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.

Figure 6-26 Installing a 3.5-inch Device (Media Card Reader Shown)

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 FDD1.

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 JUSB2.

NOTE: Refer to System Board Drive Connections on page 46 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.

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

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 28).

2. Remove the computer access panel (

Computer Access Panel on page 32).

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

Figure 6-27 Removing the Hard Drive Cage Screws

Drives 53

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.

Figure 6-28 Releasing the Hard Drive Cage

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

Figure 6-29 Removing the Hard Drive Cage

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

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

Figure 6-30 Disconnecting the Hard Drive Cables

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).

Figure 6-31 Removing the Hard Drive

Installing an Internal 3.5-inch Hard Drive

1. Follow the steps in Removing an Internal 3.5-inch Hard Drive on page 53 to remove the hard drive

cage and, if necessary, the existing hard drive.

Drives 55

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.

Figure 6-32 Installing the Hard Drive in the Drive Cage

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

Figure 6-33 Connecting the Hard Drive Cables

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.

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

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).

Figure 6-34 Installing the Hard Drive Cage

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

Figure 6-35 Securing the Hard Drive Cage

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 SATA1 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: SATA1, SATA2, SATA4, SATA3.

7. Replace the computer access panel.

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

Drives 57

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 28).

2. Remove the computer access panel (

Computer Access Panel on page 32).

3. Remove the front bezel (

Front Bezel on page 33).

4. Disconnect the front USB cable from the yellow system board connector (JAUD1) and the I/O cable

from the white system board connector (FUSB1).

5. Stand the unit upright.

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

7. Slide the panel assembly upward (2), and then pull the assembly away from the unit while threading

the wires through the hole in the front of the chassis.

Figure 6-36 Removing the front USB panel

To reinstall the panel, reverse the removal procedure.

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

Power Switch/LED Assembly

1. Prepare the computer for disassembly (Preparation for Disassembly on page 28).

2. Remove the computer access panel (

Computer Access Panel on page 32).

3. Remove the front bezel (

Front Bezel on page 33).

4. Remove the optical drive (

Removing an Optical Drive on page 48).

5. Disconnect the cable from the black system board connector labeled JFP1.

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.

Figure 6-37 Removing the power switch/LED assembly

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.

Power Switch/LED Assembly 59

Heat sink

WARNING! 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.

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

1. Prepare the computer for disassembly (

Preparation for Disassembly on page 28).

2. Remove the computer access panel (

Computer Access Panel on page 32).

3. Unplug the fan cable from the system board (CPU FAN1).

4. Loosen the four silver T15 captive screws that secure the heat sink to the system board.

Figure 6-38 Removing the heat sink

CAUTION: Heat sink retaining screws should be removed in diagonally opposite pairs (as in an

X) to even the downward forces 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.

5. Remove the heat sink from the processor.

When reinstalling the heat sink, 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: Heat sink retaining screws should be tightened in diagonally opposite pairs (as in an X) to

evenly seat the heat sink 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.

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

Processor

1. Prepare the computer for disassembly (Preparation for Disassembly on page 28).

2. Remove the computer access panel (

Computer Access Panel on page 32).

3. Remove the heat sink (

Heat sink on page 60).

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

Figure 6-39 Removing the processor

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 heat sink, go to step 3.

If using a new heat sink, go to step 5.

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

the processor.

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

Processor 61

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

it in position atop the processor.

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

attach the heat sink control cable to the system board.

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

X) to evenly seat the heat sink 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.

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:

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

Rear Chassis Fan

1. Prepare the computer for disassembly (Preparation for Disassembly on page 28).

2. Remove the computer access panel (

Computer Access Panel on page 32).

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

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

Figure 6-40 Removing the rear chassis fan

5. Lift the fan out of the chassis.

To install the fan assembly, reverse the removal procedure.

CAUTION: Be sure to orient the air flow out of the unit.

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

Power Supply

1. Prepare the computer for disassembly (Preparation for Disassembly on page 28).

2. Remove the computer access panel (

Computer Access Panel on page 32).

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.

Figure 6-41 Removing the power supply screws

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.

Figure 6-42 Removing the power supply

6. Rotate the power supply slightly toward the left and front of the unit, and then lift the power supply

out of the chassis.

Power Supply 63

To install the power supply, reverse the removal procedure.

System Board

1. Prepare the computer for disassembly (Preparation for Disassembly on page 28).

2. Remove the computer access panel (

Computer Access Panel on page 32).

3. Remove all expansion boards (

Expansion Cards on page 40).

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

5. Remove the heat sink (

Heat sink on page 60).

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

Figure 6-43 Removing the system board

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.

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

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

Computer Setup (F10)

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.

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

http://www.hp.com/

recycle.

1. Prepare the computer for disassembly (Preparation for Disassembly on page 28).

2. Remove the computer access panel (

Computer Access Panel on page 32).

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:

Battery 65

Type 1 Battery Holder

1. Lift the battery out of its holder.

Figure 6-44 Removing the battery – Type 1 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

Computer

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.

Figure 6-45 Removing the battery – Type 2 holder

3. Replace the computer access panel.

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

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

Computer

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.

Figure 6-46 Removing the battery – Type 3 holder

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

Computer

Setup (F10) Utility on page 3.

Battery 67

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

Data

Unused

Ground

+5 VDC

Clock

Unused

Mouse

Connector and Icon Pin Signal

Data

Unused

Ground

+5 VDC

Clock

Unused

68 Appendix A Connector Pin Assignments

Ethernet RJ-45

Connector and Icon Pin Signal

(+) Transmit Data

(-) Transmit Data

(+) Receive Data

Unused

(-) Receive Data

Unused

Parallel Interface

Connector and Icon

Pin Signal Pin Signal

Strobe

Data Bit 0

Data Bit 1

Data Bit 2

Acknowledge

Busy

Paper End

Select

Data Bit 3

Data Bit 4

Data Bit 5

Data Bit 6

Auto Linefeed

Error

Initialize Printer

Select IN

9 Data Bit 7 18–25 Signal Ground

Ethernet RJ-45 69

Serial Interface, Powered and Non-Powered

Connector and Icon Pin Signal

Carrier Detect (12V if powered)

Receive Data

Transmit Data

Data Terminal Ready

Signal Ground

Data Set Ready

Request to Send

Clear to Send

Ring Indicator (5V if powered)

USB

Connector and Icon Pin Signal

+5 VDC

- Data

+ Data

Ground

Microphone

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

1 (Tip)

2 (Ring)

3 (Shield)

Audio_left

Power_Right

Audio_right

Headphone

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

1 (Tip)

2 (Ring)

3 (Shield)

Audio_left

Power_Right

Ground

70 Appendix A Connector Pin Assignments

Line-in Audio

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

1 (Tip)

2 (Ring)

3 (Shield)

Audio_In_Left

Audio_In_Right

Ground

Line-out Audio

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

1 (Tip)

2 (Ring)

3 (Shield)

Audio_Out_Left

Audio_Out_Right

Ground

Monitor

Connector and Icon

Pin Signal Pin Signal

Red Analog

Green Analog

Blue Analog

Not used

+5V (fused)

Ground

Not used

DDC Serial Data

Ground

Horizontal Sync

Vertical Sync

DDC Serial Clock

Line-in Audio 71

24-Pin Power

Connector

Front

Pin Signal Pin Signal Pin Signal Pin Signal

+3.3V

GND

+5V

GND

+5V

GND

POK

+5 Vaux

+12V

+3.3V

–12V

GND

PSON

GND

open

+5V

GND

4-Pin Power (for CPU)

Connector and Icon Pin Signal

GND

+12V CPU

-12V CPU

SATA Data and Power

Drive Connector

Pin Signal Pin Signal Pin Signal Pin Signal

S1S5Ground

B-

S2S6A+

B+

S3S7A-

Ground

S4 Ground

72 Appendix A Connector Pin Assignments

P13

Ground

B-

V 5

V 12

P10

P14

V 3.3

Ground

V12

P11

P15

V 3.3

V 5

Reserved

V 12

P12

Ground

V 5

Ground

S = Data, P = Power

PCI Express

x1, x4, x8, and x16 PCI Express Connector

Pin A

Signal Pin Signal Pin Signal Pin Signal Pin Signal

PRSNT1

+12V

GND

JTAG2

JTAG3

JTAG4

JTAG5

+3.3V

PERST#

GND

REFCLK+

REFCLK-

GND

PERp0

PERn0

GND

RSVD

GND

PERp1

PERn1

GND

PERp2

PERn(2)

GND

PERp3

PERn3

GND

RSVD

GND

PERp4

PERn4

GND

PERp5

PERn5

GND

PERp6

PERn6

GND

PERp7

PERn7

GND

RSVD

GND

PERp8

PERN8

GND

PERp9

PERn9

GND

PERp10

PERn10

GND

PERp11

PERn11

GND

PERp12

PERn12

GND

PERp13

PERn13

GND

PCI Express 73

PERp14

PERn14

GND

PERp15

8182PERn15

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

PCI Express

x1, x4, x8, and x16 PCI Express Connector

Pin B

Signal Pin Signal Pin Signal Pin Signal Pin Signal

+12V

RSVD

GND

SMCLK

SMDAT

GND

+3.3 V

JTAG1

3.3vAux

WAKE#

RSVD

GND

PETp0

PETn0

GND

PETp1

PETn1

GND

PETp2

PETn2

GND

PETp3

PETn3

GND

RSVD

PRSNT2#

GND

PETp4

PETn4

GND

PETp5

PETn5

GND

PETp6

PRTn6

GND

PETp7

PETn7

GND

PRSNT2#

GND

PETp8

PETn8

GND

PETp9

PETn9

GND

PETp10

PETn10

GND

PETp11

PETn11

GND

PETp12

PETn12

GND

PETp13

PETn13

GND

PETp14

PETn14

74 Appendix A Connector Pin Assignments

GND

PETp15

PETn15

GND

8182PRSNT2#

RSVD

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 Mini Card

PCI Express Mini Card Connector

Pin Signal Pin Signal Pin Signal Pin Signal Pin Signal

WAKE#

3.3V

Reserved**

GND

Reserved**

1.5V

CLKREQ#

UIM_PWR

GND

UIM_DATA

REFCLK-

UIM_CLK

REFCLK+

UIM_RESET

GND

UIM_VPP

Reserved *** (UIM_C8)

GND

Reserved*** (UIM_C4)

W_DISABLE#

GND

PERST#

PERn0

+3.3Vaux

PERp0

GND

+1.5V

GND

SMB_CLK

PETn0

SMB_DATA

PETp0

GND

USB_D-

Reserved*

USB_D+

Reserved*

GND

Reserved*

LED_WWAN#

Reserved*

LED_WLAN#

Reserved*

LED_WPAN#

Reserved*

+1.5V

Reserved*

GND

Reserved*

+3.3V

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)

PCI Express Mini Card 75

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

or 18AWG, and the length of the cord

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.

76 Appendix B Power Cord Set Requirements

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)

EANSW

OVE

CEBC

CSA

Italy (1)

Japan (3)

Norway (1)

Sweden (1)

IMQ

METI

NEMKO

SEMKO

Denmark (1)

Finland (1)

France (1)

Germany (1)

DEMKO

SETI

UTE

VDE

Switzerland (1)

United Kingdom (1)

United States (2)

SEV

BSI

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

conductor size. Wall plug must

be a two-pole grounding type with a Japanese Industrial Standard C8303 (7A, 125V) configuration.

Country-Specific Requirements 77

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 site at

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

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 the Computer Setup (F10) Utility Guide 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

Interpreting POST Audible Codes on page 85 to interpret the

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.”

●

Refer to the comprehensive online technical support at

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

●

Refer to

Helpful Hints on page 79 in this guide for more general suggestions.

78 Appendix C Troubleshooting

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

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

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:

●

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.

Helpful Hints 79

●

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).

Select the proper AC voltage using the selector switch.

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.

Reseat drive data and power supply cables.

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

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.

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

Cause

Solution

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

until the computer turns off.

2. Disconnect the power cord from the electrical outlet.

Computer will not respond to USB keyboard or mouse.

Cause Solution

System has locked up. Restart computer.

80 Appendix C Troubleshooting

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

Solution

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.

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.

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

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

Poor performance is experienced.

Cause Solution

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

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

2. Make sure fans are connected and working properly

(some fans only operate when needed).

3. Make sure the processor heat sink is installed properly.

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

hard drive.

Low on memory. Add more memory.

Hard drive fragmented. Defragment hard drive.

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

Restart the computer.

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

Solving General Problems 81

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

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.

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

and to the electrical outlet.

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

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

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

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.

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

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

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

Bad monitor. Try a different monitor.

82 Appendix C Troubleshooting

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 85 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.

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

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

the computer to integrate the device with the computer system.

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

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

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

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 resource conflict.

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

Solving Hardware Installation Problems 83

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

Interpreting POST Audible Codes on page 85 to determine possible

causes.

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

Support.

84 Appendix C Troubleshooting

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

Bad memory or memory configuration error.

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

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

No graphics card installed or graphics card initialization failed.

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.

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

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

1. Upgrade the BIOS to proper version.

2. Change the processor.

1 short beep followed by a one second pause

No legacy floppy drive or optical drive found.

1. Check cable connections.

2. Run the Computer Setup utility and ensure

the device port is enabled.

2 short beeps followed by a three second pause

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

and use the correct media type.

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

3 short beeps followed by a three second pause

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

Upgrade the BIOS to proper version.

4 short beeps followed by a three second pause

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

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.

5 short beeps followed by a three second pause

BIOS recovery was successful No action required.

Interpreting POST Audible Codes 85

Contacting Customer Support

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

http://www.hp.com.

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.

86 Appendix C Troubleshooting

D Specifications

Table D-1 Specifications

Desktop Dimensions

Height

Width

Depth

14.76 in

6.98 in

16.88 in

37.5 cm

17.73 cm

42.87 cm

Approximate Weight 23.5 lb 10.66 kg

Temperature Range

Operating

Nonoperating

50° to 95°F

-22° to 140°F

10° to 35°C

-30° to 60°C

Relative Humidity (noncondensing)

Operating

Nonoperating (38.7°C max wet bulb)

10-90%

5-95%

10-90%

5-95%

Maximum Altitude (unpressurized)

Operating

Nonoperating

10,000 ft

30,000 ft

3048 m

9144 m

NOTE: Operating temperature is derated 1.0° C per 300 m (1000 ft) to 3000 m (10,000 ft) above sea level; no direct

sustained sunlight. Maximum rate of change is 10° C/Hr. The upper limit may be limited by the type and number of options installed.

Heat Dissipation

Maximum

Typical (idle)

1575 BTU/hr

307 BTU/hr

397 kg-cal/hr

77 kg-cal/hr

Power Supply

Operating Voltage Range

Rated Voltage Range

Rated Line Frequency

115V

90-132 VAC

100-127 VAC

50-60 Hz

230V

180-264 VAC

200-240 VAC

50-60 Hz

Power Output 300 W 300 W

Rated Input Current (maximum)

8A @ 100 VAC 4A @ 200 VAC

This system utilizes a passive power factor corrected power supply. The power factor correction is present in the 230V

operating mode only. This allows the system to pass the CE mark requirements for use in the countries of the European Union.

This supply requires the use of an input voltage range select switch.

Table D-1 Specifications (continued)

88 Appendix D Specifications

Index

Symbols/Numerics

24-pin power pin assignments 72 4-pin power pin assignments 72

access panel

removal and replacement 32

battery

disposal 26 removal and replacement 65

cable connections 36 cable management 35 cable pinouts

SATA data 17 SATA power 17

cautions

AC power 19 cables 25 cooling fan 24 electrostatic discharge 20 keyboard cleaning 23 keyboard keys 24

chassis

illustrated 19

cleaning

computer 23 mouse 24

safety precautions 23 computer cleaning 23 connections 36 connector pin assignments 68 country power cord set

requirements 77

diagnostics utility 10

disassembly preparation 28 diskette drive

installing 51 removing 50

drives

locations 47

electrostatic discharge (ESD)

preventing damage 20

ethernet

RJ-45 pin assignments 69 expansion card sockets 40 expansion slot cover

removing 41

replacing 43 external security 29

fan, power supply 24 front bezel

removal and replacement 33

removing blanks 34 front USB panel

removal and replacement 58

grounding methods 21

hard drive

installing 55

proper handling 25

removing 53

SATA characteristics 16 headphone pin assignments 70 heat sink

removal and replacement 60

Insight Diagnostics 10 installing

diskette drive 51 hard drive 55 media card reader 51 optical drive 49

keyboard

cleaning 23 pin assignments 68

line-in audio pin assignments 71 line-out audio pin

assignments 71

locks

cable lock 29 HP Business PC Security

Lock 30

padlock 29

media card reader

installing 51 removing 50

memory

removal and replacement 37 microphone pin assignments 70 monitor

pin assignments 71 mouse

cleaning 24

pin assignments 68

operating guidelines 22

Index 89

optical drive

installing 49 removing 48

overheating, prevention 22

parallel interface pin

assignments 69 PCI card 40, 42 PCI Express card 40, 42 PCI Express Mini Card pin

assignments 75 PCI Express pin assignments 73 power cord set requirements

country specific 77

power supply

fan 24 removal and replacement 63

power switch/LED assembly

removal and replacement 59

processor

removal and replacement 61

product ID location 27

rear chassis fan

removal and replacement 62

removal and replacement

access panel 32 battery 65 front bezel 33 front USB panel 58 heat sink 60 memory 37 power supply 63 power switch/LED

assembly 59 processor 61 rear chassis fan 62 system board 64

removing

bezel blanks 34 diskette drive 50 expansion slot cover 41 hard drive 53 media card reader 50 optical drive 48 PCI card 42 PCI Express card 42

safety precautions

cleaning 23

SATA

connectors on system

board 16 data cable pinouts 17 hard drive characteristics 16 pin assignments 72 power cable pinouts 17

screws, correct size 25 security

cable lock 29 HP Business PC Security

Lock 30 padlock 29

serial interface pin

assignments 70 serial number location 27 service considerations 24 software

backing up 14 servicing computer 24

spare part number

tamper-resistent wrench 25 Torx T-15 screwdriver 24

specifications

computer 87

memory 37 static electricity 20 system board

removal and replacement 64

SATA connectors 16 system board connections 36

tamper-proof screws

tool 25 temperature control 22 tools, servicing 24 Torx T15 screwdriver 24

USB pin assignments 70

ventilation, proper 22

90 Index

HP dx2420 Service & Reference Manual

Specifications and Main Features

Frequently Asked Questions

User Manual