HP dx2358 MT, dx2355 MT Service & Reference Manual

service reference guide

HP Compaq dx2355 MT/dx2358 MT

Business PCs

1st Edition

This document provides information on the removal and replacement of all parts as well as information on troubleshooting, Desktop Management, setup

utilities, SATA drives, safety, routine care, connector pin assignments, POST error messages, and diagnostic indicator lights.

Document Part Number 489243-001

Service Reference Guide

HP Compaq dx2355 MT/dx2358 MT Business PCs

1st Edition

Document Part Number: 489243-001

March 2008

Microsoft, MS-DOS, Windows, and Windows NT 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.

WARNING: Text set off in this manner indicates that failure to follow directions could result in bodily

harm or loss of life.

CAUTION: Text set off in this manner indicates that failure to follow directions could result in damage to

equipment or loss of information.

Service Reference Guide

HP Compaq dx2355 MT/dx2358 MT Business PCs

First Edition (March 2008)

Document Part Number: 489243-001

Contents

1 Installing the Operating System

1.1 Microsoft Windows XP/Windows Vista/Redflag Linux . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1

1.1.1 Installing or Upgrading Device Drivers (Only applicable for Windows OS) . . . . . . . . 1–1

1.2 Converting to NTFS (Associated with Windows OS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2

1.2.1 Windows XP Home/XP Professional(Vista downgrade)/ Vista Basic/Vista Business 32 1–2

1.3 HP Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2

2 Setup Utilities and Diagnostics Features

2.1 Power-On Self-Test (POST). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1

2.2 Computer Setup Utilities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–2

2.2.1 Using Computer Setup (F10) Utilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–2

2.2.2 Computer Setup Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–4

2.3 Recovering the Configuration Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–10

2.3.1 Backing up the CMOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–10

2.3.2 Restoring the CMOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–10

3 Desktop Management

3.1 Initial Configuration and Deployment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–1

3.2 ROM Flash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–1

3.2.1 FailSafe Boot Block ROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–1

3.2.2 Dual-State Power Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2

3.2.3 Power Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2

3.2.4 World Wide Web Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–3

3.3 Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–3

3.3.1 Password Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–3

3.3.2 Establishing a Supervisor Password Using Computer Setup . . . . . . . . . . . . . . . . . . . . . 3–3

3.3.3 Establishing a User Password Using Computer Setup. . . . . . . . . . . . . . . . . . . . . . . . . . 3–3

3.3.4 Surge-Tolerant Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–6

4 Serial ATA Drive Guidelines and Features

4.1 SATA 3.0 Hard Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1

4.2 SATA Hard Drive Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2

4.2.1 SATA Data Cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2

4.2.2 SATA Power Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2

4.3 SATA SMART Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–3

4.4 Drive Capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–3

4.5 SATA BIOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–3

Service Reference Guide 489243-001 iii

Contents

5 Identifying the Chassis, Routine Care, and Disassembly Preparation

5.1 Chassis Designations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1

5.1.1 Microtower (MT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1

5.2 Electrostatic Discharge Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–3

5.2.1 Generating Static . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–3

5.2.2 Preventing Electrostatic Damage to Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–3

5.2.3 Personal Grounding Methods and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–4

5.2.4 Grounding the Work Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–4

5.2.5 Recommended Materials and Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–4

5.3 Routine Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–5

5.3.1 General Cleaning Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–5

5.3.2 Cleaning the Computer Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–5

5.3.3 Cleaning the Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–6

5.3.4 Cleaning the Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–6

5.3.5 Cleaning the Mouse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–6

5.4 Service Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–7

5.4.1 Tools and Software Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–7

5.4.2 Screws. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–7

5.4.3 Cables and Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–8

5.4.4 Hard Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–8

5.4.5 Lithium Coin Cell Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–8

6 Removal and Replacement Procedures—Microtower (MT) Chassis

6.1 Preparation for Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–1

6.2 Remove the computer access panel and front bezel (MT chassis) . . . . . . . . . . . . . . . . . . . . . 6–2

6.2.1 Access Panel (MT Chassis) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–2

6.2.2 Front Bezel (MT Chassis) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–3

6.3 Front Drive Bezels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–4

6.3.1 Removing a 5.25" Drive Bezel Blank/MT Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–4

6.4 Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–5

6.4.1 Installing Memory Modules/MT chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–5

6.5 Expansion Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–6

6.5.1 Expansion Slot Cover Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–6

6.5.2 PCI/PCIe Expansion Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–7

6.5.3 Installing an Expansion Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–8

6.5.4 Removing an Expansion Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–10

6.6 Cable Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–11

6.7 Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–12

6.7.1 Locating Drive Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–12

6.7.2 Removing a Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–13

6.8 Front I/O Panel Housing Assembly - MT chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–17

6.9 System Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–18

6.10 Heatsink - MT chassis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–19

6.11 Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–20

6.12 System Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–22

6.13 Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–23

6.13.1Battery Holder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–24

6.14 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–25

iv 489243-001 Service Reference Guide

A Connector Pin Assignments

B Power Cord Set Requirements

C POST Error Messages

D Troubleshooting Without Diagnostics

E Memory

Contents

Service Reference Guide 489243-001 v

Installing the Operating System

Depending on the model, Microsoft Windows XP Home, Windows XP Professional (Vista Downgrade), Windows Vista Basic, Windows Vista Business 32 or Redflag Linux is preinstalled on the computer and will be configured automatically the first time the computer is turned on.

CAUTION: Do not add optional hardware devices to your computer until the operating system is

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

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 might damage the software that runs the computer.

1.1 Microsoft Windows XP/Windows Vista/ Redflag Linux

The first time the computer is turned on, Microsoft Windows or Redflag Linux is automatically installed. This takes several minutes, depending on the system hardware configuration. Read and follow the instructions that appear on the screen to complete the installation. do not turn off your computer unless you are directed to do so.

During this process,

1.1.1 Installing or Upgrading Device Drivers (Only applicable for Windows OS)

To install optional hardware devices after the OS installation is completed, you must install the device drivers for the device you are installing.

The I386 directory and its subdirectories provide the HP- or Compaq-specific integration of the operating system for the computer model and include device drivers supported by the operating system.

When prompted for the I386 directory on the operating system CD, replace the path with C:\I386

or use the Browse button of the dialog box to browse the computer for the I386 folder. This action

points to the appropriate drivers.

The latest support software is also available from the Web site at

At product launch, Vista capable program is applied for some of satisfied system shipment. (Major consideration of whether applicable is to meet minimum 1GB memory or not.)

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

Service Reference Guide 489243-001 1–1

Installing the Operating System

1.2 Converting to NTFS (Associated with Windows OS)

1.2.1 Windows XP Home/XP Professional(Vista downgrade)/ Vista Basic/Vista Business 32

The Windows XP Home/XP Professional (Vista downgrade)/Vista Basic/Vista Business 32 operating systems handle only NTFS-formatted drives. When installed, XP or Vista will, if necessary, automatically convert a FAT32 drive to NTFS.

1.3 HP Software

The Microsoft Windows operating system (Windows XP Home or XP Professional(Vista downgrade) or Vista Basic or Vista Business 32) is preinstalled on the computer and will be configured automatically the first time the computer is turned on. All other software is userinstalled.

Certain drivers and utilities are available only in selected languages. You can obtain the latest version of these files, in English and selected other languages, in one of these ways:

■ HP web site at www.hp.com

■ Restore Plus! CD, which is supplied with many Compaq models

Additional HP software may be required in certain situations.

✎

1–2 489243-001 Service Reference Guide

Setup Utilities and Diagnostics Features

Setup Utilities (F10) and diagnostic features provide information needed about the computer system when contacting Customer Support. These tools can also be used to:

■ Change factory default settings and to set or change the system configuration, which may be

necessary when you add or remove hardware.

■ Determine if all of the devices installed on the computer are recognized by the system and

functioning properly.

■ Determine information about the operating environment of the computer.

■ Solve system configuration errors detected but not automatically fixed during the Power-On

Self-Test (POST).

■ Establish and manage passwords and other security features.

■ Establish and manage energy-saving timeouts.

All features identified in this chapter may not be available on all HP products.

✎

2.1 Power-On Self-Test (POST)

POST is a series of diagnostic tests that runs automatically when the system is turned on. POST checks the following items to ensure that the computer system is functioning properly:

■ Keyboard

■ Memory modules

■ Diskette drives

■ All IDE (ATA) and SATA mass storage devices

■ Processors

■ Controllers

If the Supervisor Password is set, a key icon appears on the screen while POST is running. You

✎

will need to enter the password before continuing. Refer to Chapter 3,

Configuration and Deployment,” for information on setting, deleting, or bypassing the password.

If POST finds an error in the system, an audible and/or visual message occurs. For POST error messages and their solutions refer to Appendix C, “POST Error Messages.”

Section 3.1, “Initial

Service Reference Guide 489243-001 2–1

Setup Utilities and Diagnostics Features

2.2 Computer Setup Utilities

Use Computer Setup Utilities (F10) to:

■ Modify or restore factory default settings.

■ Set the system date and time.

■ Set, view, change, or verify the system configuration including settings for processor,

graphics, memory, audio, storage, communications, and input devices.

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

USB devices.

■ Configure the boot priority of IDE (ATA) and SATA hard drive controllers.

■ Enable or disable Network Server Mode, which allows the computer to boot the operating

system when the power-on password is enabled with or without a keyboard or mouse attached. When attached to the system, the keyboard and mouse remain locked until the power-on password is entered.

■ Enable supervisor password prompting during system restarts (warm boots) as well as during

power-on.

■ 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.

■ Enable or disable removable media write ability (when supported by hardware).

■ Solve system configuration errors detected but not automatically fixed during the Power-On

Self-Test (POST).

■ Execute self-tests on a specified IDE (ATA) hard drive (when supported by the drive).

2.2.1 Using Computer Setup (F10) Utilities

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

1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart.

2. As soon as the computer is turned on, press and hold the F10 key until you enter Computer

Setup. Press

If you do not press the F10 key at the appropriate time, you must turn the computer off, then on

✎

again, and press the

If you are using a PS/2 keyboard, you may see a Keyboard Error message—disregard it.

Enter to bypass the title screen, if necessary.

F10 key again to access the utility.

2–2 489243-001 Service Reference Guide

Setup Utilities and Diagnostics Features

3. A choice of headings appears in the Computer Setup Utilities menu: Main, Advanced, Power, Boot and Exit.

4. Use the arrow (left and right) keys to select the appropriate heading. Use the arrow (up and down) keys to select the option you want, then press Utilities menu, press

Esc.

Enter. To return to the Computer Setup

5. To apply and save changes, select Save Setting and Exit.

❏ If you have made changes that you do not want applied, select Exit Without Saving. ❏ To reset to factory settings, select Load Defaults Setting. This option will restore the

original factory system defaults. You must still select Save Setting and Exit after

resetting the defaults.

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

changes because the CMOS could become corrupted. It is safe to turn off all power to the computer after you exit the F10 Setup screen.

Service Reference Guide 489243-001 2–3

Setup Utilities and Diagnostics Features

2.2.2 Computer Setup Menu

Computer Setup

Heading Option Description

Main System Date Allows you to set system date.

System Time Allows you to set system time.

Floppy Drive A Allows you to set Drive A to None or 1.44M,

3.5 inch.

1st Drive 2nd Drive 3rd Drive 4th Drive 5th Drive 6th Drive

For each, allows you to:

•view:

•Capacity

•Cylinder

•Head

•Precomp

•Landing Zone

•Sector

• SMART Support

•Transfer Mode

• SATA Speed(1st Drive and 2nd Drive are IDE port, no this information)

• NCQ(1st Drive and 2nd Drive are IDE port, no this information)

CPU TYPE (view only)

CPU ID (view only)

CPU Speed (view only)

Cache RAM (L2) (view only)

Cache RAM (L3) (view only)

Installed Memory (view only)

Memory Bank 1 (view only)

Memory Bank 2 (view only)

Memory Bank 3 (view only)

Memory Bank 4 (view only)

BIOS Revision (view only)

Core Version (view only)

Product Name (view only)

Serial Number (view only)

UUID (view only)

Asset Tag (view only)

Enter Asset Tag (view only)

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

✎

configuration.

2–4 489243-001 Service Reference Guide

Setup Utilities and Diagnostics Features

Computer Setup (Continued)

Heading Option Description

Advanced Primary Video Adaptor Allows you to specify which devices as the

primary video adapter

•PCI

•PCI-EX1

•PCI-EX16

•Onboard

Onboard Video Memory

(view only)

Size

PS/2 Mouse Allow you to Enable/Disable PS/2 mouse:

•Disable

•Enable

• Auto Detect

Onboard LAN Allow you to enable/disable onboard LAN:

•Enable

•Disable

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

✎

configuration.

Service Reference Guide 489243-001 2–5

Setup Utilities and Diagnostics Features

Computer Setup (Continued)

Heading Option Description

Advanced

(continued)

Onboard LAN Boot ROM Allows you to enable/disable onboard LAN

boot ROM:

•Enable

•Disable

PATA Controller Allows you to enable/disable PATA

controller:

•Enable

•Disable

SATA Controller Allows you to select the SATA controller to

work:

•Disable

•SATA-1

• SATA-1+2

SATA1 Controller Mode (view only)

SATA2 Controller Mode (view only)

Onboard Audio Allows you to enable/disable the onboard

audio:

•Auto

•Disable

•Enable

Internal Speaker Disables/enables the internal speaker.

SUBSYS ID (view only)

Supervisor Password Allows you to set supervisor password.

User Password Allows you to set user password.

USB Configuration Allows you to specify the USB function:

• USB Controller Disable/Enable

• USB 2.0 Controller Disable/Enable

• USB Legacy Mode Support Disable/Enable

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

✎

configuration.

2–6 489243-001 Service Reference Guide

Computer Setup (Continued)

Heading Option Description

Setup Utilities and Diagnostics Features

Advanced

(continued)

I/O Device Configuration Allows you to specify the working mode of

the I/O Device:

• Onboard Serial Port1

Allows you to select a setting for the onboard serial port:

•Disabled

•3F8/IRQ4

•2F8/IRQ3

•3E8/IRQ4

•2E8/IRQ3

•Auto

• Onboard Parallel Port

Allows you to select a setting for the onboard parallel port:

•Disabled

• 378/IRQ7

•278/IRQ5

•3BC/IRQ7

•Mode

Allows you to select parallel port mode:

• Bi-directional

•EPP

•ECP

•ECP Mode Use DMA

If Parallel Port Mode is set to ECP or ECP+EPP, allows you to set the ECP Mode Use DMA to 1 or 3.

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

✎

configuration.

Service Reference Guide 489243-001 2–7

Setup Utilities and Diagnostics Features

Computer Setup (Continued)

Heading Option Description

Advanced

(continued)

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

✎

configuration.

Hardware Monitor Allow you to monitor the CPU temperature

and FAN parameters:

• CPU Temperature (View Only)

• CPU FAN Speed (View Only)

• System FAN Speed (View Only)

• CPU FAN Check Disable/ enable this feature

• System FAN Check Disable/ enable this feature

• FAN Control Disable/ enable this feature

• Initial/Idle Fan Voltage Specify the initial/idle FAN voltage

• Acceleration Starts at Specify the critical temperature of FAN acceleration

• Switch to Full Speed at (View Only)

• Full Speed Temperature Setting Specify the full speed temperature

• PWM Ramp Range Specify the PWM ramp temperature range

2–8 489243-001 Service Reference Guide

Setup Utilities and Diagnostics Features

Computer Setup (Continued)

Heading Option Description

Power After AC Power Failure Allows you to select system power loss

behavior:

•Auto

•Power On

•Stay Off

S3 Disable/Enable suspend to RAM feature.

Virtualization Technology Disable/Enable VT feature.

NX (No eXecute) (view only)

Boot Boot-Time Diagnostics

Screen

Disables/enables automatic reconfiguration. The default is Disabled.

Boot Device Priority Allows you to specify which devices will boot

first, second, third and fourth, or to disable any of the four: Floppy Group/HDD Group/ CD-ROM Group/Network Boot Group

• 1st Boot Device

• 2nd Boot Device

• 3rd Boot Device

• 4th Boot Device

Exit Exit Saving Changes Allows you to save current settings and exit

Computer Setup.

Exit Discarding Changes Allows you to exit Computer Setup without

saving changes.

Load Setup Defaults Allows you to reset Computer Setup to

factory defaults.

Save Changes Allows you save the changes

Discard Changes Allows you discard the changes

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

✎

configuration.

Service Reference Guide 489243-001 2–9

Setup Utilities and Diagnostics Features

2.3 Recovering the Configuration Settings

Recovering the configuration settings established in the Computer Setup (F10) Utility requires that you first back up the settings before a recovery is needed.

The CMOS Save/Load utility firmware can be found at & Driver Downloads for your specific model. Download the firmware files into a folder on a removable storage device. It is recommended that you save any modified computer configuration settings to a diskette, a USB flash media device, or a diskette-like device (a storage device set to emulate a diskette drive) and save the diskette or device for possible future use.

2.3.1 Backing up the CMOS

1. Make sure the computer to be backed up is turned on. Connect the removable storage to the computer.

2. In Windows, click Start > Run, type CMD, and click OK to open a DOS command window.

3. Type N:\folder\ BIOS.exe SAVE:ABC001.DAT (where N is the drive letter of the

removable storage) to save the CMOS setting to the removable storage device.

2.3.2 Restoring the CMOS

1. Make sure the target computer is turned on. Connect the removable storage to the target computer.

2. In Windows, click Start > Run, type CMD, and click OK. to open a DOS command

window.

3. Type N:\folder\BIOS.exe LOAD:ABC001.DAT (where N is the drive letter of the

removable storage) to load the custom CMOS setting onto the target system.

http://www.hp.com under the Software

2–10 489243-001 Service Reference Guide

Desktop Management

Support for specific features described in this guide may vary by model or software version.

✎

3.1 Initial Configuration and Deployment

HP computers come with a preinstalled system software image. After a brief software “unbundling” process, the computer is ready to be used.

A customized software image may be deployed by:

■ Installing additional software applications after unbundling the preinstalled software image.

The best deployment method depends on your information technology environment and processes. The PC Deployment section of the Solutions and Services Web site

http://h18000.www1.hp.com/solutions/pcsolutions provides information to help you select the

best deployment method.

The Restore Plus! CD, ROM-based setup, and ACPI hardware provide further assistance with

recovery of system software, configuration management and troubleshooting, and power management.

3.2 ROM Flash

The computer’s BIOS is stored in a programmable flash ROM (read only memory). By establishing a supervisor password in the Computer Setup (F10) utility, you can protect the ROM from being unintentionally updated or overwritten. This is important to ensure the operating integrity of the computer. Should you need or want to upgrade the BIOS, you may download the latest BIOS images from the HP driver and support page: http://www.hp.com/support.

CAUTION: For maximum ROM protection, be sure to establish a supervisor password. The supervisor

password prevents unauthorized ROM upgrades.

3.2.1 FailSafe Boot Block ROM

The FailSafe Boot Block ROM allows for system recovery in the unlikely event of a ROM flash failure, for example, if a power failure were to occur during a ROM upgrade. The Boot Block is a flash-protected section of the ROM that checks for a valid system ROM flash when power to the system is turned on.

■ If the system ROM is valid, the system starts normally.

■ If the system ROM fails the validation check, the FailSafe Boot Block ROM provides

enough support to start the system from a bootable removable media that automatically invokes system BIOS upgrade utilities.

To recover the system after it enters Boot Block recovery mode, complete the following steps:

Service Reference Guide 489243-001 3–1

Desktop Management

1. Remove all removable media and turn off the power.

2. Insert a diskette, CD, or USB flash device containing the desired BIOS image file in the root directory. The media must be formatted using the FAT12, FAT16, or FAT32 file system.

3. Turn on power to the system.

If no appropriate BIOS image file is found, the failsafe Boot Block BIOS will attempt to start the system from a bootable device. If no bootable device is found, you will be prompted to insert media containing a BIOS image file or BIOS upgrade utility.

If the system successfully reprograms the ROM, the system will automatically power off.

4. Remove the removable media used to upgrade the BIOS.

5. Turn the power on to restart the computer.

3.2.2 Dual-State Power Button

With Advanced Configuration and Power Interface (ACPI) enabled for Windows XP/Vista, the power button can function either as an on/off switch or as a suspend button. The suspend feature does not completely turn off power, but instead causes the computer to enter a low-power standby. This allows you to quickly power down without closing applications and to quickly return to the same operational state without any data loss.

To change the power button’s configuration, complete the following steps:

1. Left click on the Start Button, then select Control Panel > Power Options.

2. In the Power Options Properties, select the Advanced tab.

3. In the Power Button section, select the desired power button setting.

After configuring the power button to function as a suspend button, press the power button to put the system in a very low power state (suspend). Press the button again to quickly bring the system out of suspend to full power status. To completely turn off all power to the system, press and hold the power button for four seconds.

CAUTION: Do not use the power button to turn off the computer unless the system is not responding;

turning off the power without operating system interaction could cause damage to or loss of data on the hard drive.

3.2.3 Power Management

Power Management is a feature that saves energy by shutting down certain components of the computer when they are not in use, thus saving energy without having to shut down the computer.

With Advanced Configuration and Power Interface (ACPI) enabled for Windows XP/Vista, timeouts (the period of inactivity allowed before shutting down these components) can be enabled, customized, or disabled using the operating system.

1. In Windows XP/Vista, left click on the Start Button, then select Control Panel > Power

Options.

2. In the Power Options Properties, select the Power Schemes tab.

3. Select the desired power scheme settings.

Use Display Properties to establish, modify, or disable Power Management settings for the

monitor. To access Display Properties, right click on the Windows Desktop, then choose

Properties.

3–2 489243-001 Service Reference Guide

3.2.4 World Wide Web Site

When making the transition to new or revised operating systems, it is important to implement the support software designed for that operating system. If you plan to run a version of Microsoft Windows that is different from the version included with your computer, you must install corresponding device drivers and utilities to ensure that all features are supported and functioning properly.

HP has made the task of locating, accessing, evaluating, and installing the latest support software easier. You can download the software from the latest device drivers, utilities, and flashable ROM image needed to run the latest Microsoft Windows operating system on your HP computer.

3.3 Security

3.3.1 Password Security

The user password prevents unauthorized use of the computer by requiring entry of a password to access applications or data each time the computer is turned on or restarted. The supervisor password specifically prevents unauthorized access to Computer Setup, and can also be used as an override to the user password. That is, when prompted for the user password, entering the supervisor password instead will allow access to the computer.

Desktop Management

http://www.hp.com/support. The Web site contains

A network-wide setup password can be established to enable the system administrator to log in to all network systems to perform maintenance without having to know the power-on password, even if one has been established.

3.3.2 Establishing a Supervisor Password Using Computer Setup

Establishing a supervisor password through Computer Setup prevents reconfiguration of the computer (use of the Computer Setup (F10) utility) until the password is entered.

1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart.

2. As soon as the computer is turned on, press and hold the F10 key until you enter Computer Setup. Press

If you do not press the F10 key at the appropriate time, you must turn the computer off, then on

✎

again, and press the

If you are using a PS/2 keyboard, you may see a Keyboard Error message—disregard it.

3. Select Set Supervisor Password and follow the instructions on the screen.

4. Before exiting, click Save and Exit Se tup.

Enter to bypass the title screen, if necessary.

F10 key again to access the utility.

3.3.3 Establishing a User Password Using Computer Setup

Establishing a user password through Computer Setup prevents access to the computer when power is turned on, unless the password is entered. When a user password is set, Computer Setup presents Password Options under the Security menu. Password options include Password Prompt on Warm Boot. When Password Prompt on Warm Boot is enabled, the password must also be entered each time the computer is rebooted.

Service Reference Guide 489243-001 3–3

Desktop Management

1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart.

2. As soon as the computer is turned on, press and hold the F10 key until you enter Computer Setup. Press

If you do not press the F10 key at the appropriate time, you must turn the computer off, then on

✎

again, and press the

If you are using a PS/2 keyboard, you may see a Keyboard Error message—disregard it.

3. Select Set User Password and follow the instructions on the screen.

4. Before exiting, click Save and Exit Se tup.

Entering a User Password

To enter a user password, complete the following steps:

1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart.

2. When the key icon appears on the monitor, type your current password, then press Enter.

Type carefully; for security reasons, the characters you type do not appear on the screen.

✎

Enter to bypass the title screen, if necessary.

F10 key again to access the utility.

If you enter the password incorrectly, a broken key icon appears. Try again. After three unsuccessful tries, you must turn off the computer, then turn it on again before you can continue.

Entering a Supervisor Password

If a supervisor password has been established on the computer, you will be prompted to enter it each time you run Computer Setup.

1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart.

2. As soon as the computer is turned on, press and hold the F10 key until you enter Computer Setup. Press

If you do not press the F10 key at the appropriate time, you must turn the computer off, then on

✎

again, and press the

If you are using a PS/2 keyboard, you may see a Keyboard Error message—disregard it.

3. When the key icon appears on the monitor, type the setup password, then press the Enter key.

Type carefully; for security reasons, the characters you type do not appear on the screen.

Enter to bypass the title screen, if necessary.

F10 key again to access the utility.

✎

If you enter the password incorrectly, a broken key icon appears. Try again. After three unsuccessful tries, you must turn off the computer, then turn it on again before you can continue.

Changing a User or Supervisor Password

1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart. To change the setup password, run Computer Setup.

2. To change the user password, go to step 3.

3–4 489243-001 Service Reference Guide

Desktop Management

To change the supervisor password, as soon as the computer is turned on, press and hold the

F10 key until you enter Computer Setup. Press Enter to bypass the title screen, if necessary.

If you do not press the F10 key at the appropriate time, you must turn the computer off, then on

✎

again, and press the

If you are using a PS/2 keyboard, you may see a Keyboard Error message—disregard it.

3. When the key icon appears, type your current password, a slash (/) or alternate delimiter character, your new password, another slash (/) or alternate delimiter character, and your new password again as shown:

current password/new password/new password

Type carefully; for security reasons, the characters you type do not appear on the screen.

F10 key again to access the utility.

✎

4. Press the Enter key.

The new password takes effect the next time you turn on the computer.

Refer to the “National Keyboard Delimiter Characters” section in this chapter for information

✎

about the alternate delimiter characters. The user password and supervisor password may also be changed using the Security options in Computer Setup.

Deleting a User or Supervisor Password

1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart. To delete the supervisor password, run Computer Setup.

2. To delete the user password, go to step 3.

To delete the supervisor password, as soon as the computer is turned on, press and hold the

F10 key until you enter Computer Setup. Press Enter to bypass the title screen, if necessary.

If you do not press the F10 key at the appropriate time, you must turn the computer off, then on

✎

again, and press the

If you are using a PS/2 keyboard, you may see a Keyboard Error message—disregard it.

3. When the key icon appears, type your current password followed by a slash (/) or alternate delimiter character as shown:

current password/

4. Press the Enter key.

Refer to “National Keyboard Delimiter Characters” for information about the alternate delimiter

✎

characters. The power-on password and setup password may also be changed using the Security options in Computer Setup.

F10 key again to access the utility.

Service Reference Guide 489243-001 3–5

Desktop Management

National Keyboard Delimiter Characters

Each keyboard is designed to meet country-specific requirements. The syntax and keys that you use for changing or deleting your password depend on the keyboard that came with your computer.

Arabic / Greek - Russian / Belgian = Hebrew . Slovakian BHCSY* - Hungarian - Spanish Brazilian / Italian - Swedish/Finnish / Chinese / Japanese / Swiss Czech - Korean / Taiwanese / Danish - Latin American - Thai / French ! Norwegian - Turkish . French Canadian é Polish - U.K. English / German - Portuguese - U.S. English / * For Bosnia-Herzegovina, Croatia, Slovenia, and Yugoslavia

National Keyboard Delimiter Characters

Clearing Passwords

If you forget your password, you cannot access the computer. To clear the password, turn off and unplug the computer then, use the Clear Password jumper E69 (clear: 1-2 normal: 2-3). Close and restart the computer.

3.3.4 Surge-Tolerant Power Supply

An integrated surge-tolerant power supply provides greater reliability when the computer is hit with an unpredictable power surge. This power supply is rated to withstand a power surge of up to 410 volts within minimum 1 seconds without incurring any system downtime or data loss.

3–6 489243-001 Service Reference Guide

Serial ATA Drive Guidelines and Features

Serial ATA = SATA

✎

HP does not support the use of a PATA (IDE) hard drive / optical drive on these models of computer.

4.1 SATA 3.0 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, 5V, 12 V

Jumpers for configuring drive N/A

Data transfer rate, 80 GB and greater 3.0 Gb/s

When attaching the SATA cable to the system board always connect the primary hard drive to

✎

SATA 0.

Service Reference Guide 489243-001 4–1

Serial ATA Drive Guidelines and Features

4.2 SATA Hard Drive Cables

4.2.1 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.

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

4.2.2 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 V 12 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

4–2 489243-001 Service Reference Guide

4.3 SATA 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.

4.4 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.

Serial ATA Drive Guidelines and Features

File

System

FAT 32 ATA Windows 2000/XP/Vista 32 GB 128 PB

NTFS ATA Windows NT/2000/XP/Vista 2 TB 128 PB

Controller

Type Operating System

4.5 SATA BIOS

• SATA Controller1 in Legacy/Native Mode

- SATA 0 is accessible as Device 0 of SATA controller’s Primary Channel

- SATA 1 is accessible as Device 0 of SATA controller’s Secondary Channel

• SATA Controller 2 in Native Model

- SATA 2 is accessible as Device 1of SATA controller’s Primary Channel

- SATA 3 is accessible as Device 1 of SATA controller’s Secondary Channel

Drive/Partition Capacity Limits

Maximum Size

Partition Drive

Windows 2000, XP, Vista, and Linux

Service Reference Guide 489243-001 4–3

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.

5.1 Chassis Designations

5.1.1 Microtower (MT)

dx2355 MT

Service Reference Guide 489243-001 5–1

Identifying the Chassis, Routine Care, and Disassembly Preparation

dx2358 MT

Note: dx2358 MT is only for China Market.

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Identifying the Chassis, Routine Care, and Disassembly Preparation

5.2 Electrostatic Discharge Information

A sudden discharge of static electricity from your finger or other conductor can destroy staticsensitive 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.

5.2.1 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 bubble pack from PCB Packing PCBs in foam-lined box

7,500 V

3,000 V

400 V

7,000 V

5,000 V

15,000 V

5,000 V

800 V

20,000 V 11,000 V

700 volts can degrade a product.

✎

5.2.2 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.

35,000 V 12,000 V

6,000 V

26,500 V 21,000 V

■ Avoid contact with pins, leads, or circuitry.

■ Place reusable electrostatic-sensitive parts from assemblies in protective packaging or

conductive foam.

Service Reference Guide 489243-001 5–3

Identifying the Chassis, Routine Care, and Disassembly Preparation

5.2.3 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

5.2.4 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.

1,500

7, 5 0 0

15,000

5.2.5 Recommended Materials and Equipment

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

■ Antistatic tape

■ Antistatic smocks, aprons, or sleeve protectors

■ Conductive bins and other assembly or soldering aids

■ Conductive foam

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

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

■ Field service kits

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Identifying the Chassis, Routine Care, and Disassembly Preparation

■ 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

5.3 Routine Care

5.3.1 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.

5.3.2 Cleaning the Computer Case

Follow all safety precautions in Section 5.3.1, “General Cleaning Safety Precautions,” 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.

Service Reference Guide 489243-001 5–5

Identifying the Chassis, Routine Care, and Disassembly Preparation

5.3.3 Cleaning the Keyboard

Follow all safety precautions in Section 5.3.1, “General Cleaning Safety Precautions,” before cleaning the keyboard.

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

5.3.2, “Cleaning the Computer Case.”

When cleaning debris from under the keys, review all rules in Section 5.3.1, “General Cleaning

Safety Precautions,” before following these procedures:

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

the keys.

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

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

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

■ If you remove a key, use a specially designed key puller to prevent damage to the keys. This

tool is available through many electronic supply outlets.

CAUTION: Never remove a wide leveled key (like the space bar) from the keyboard. If these keys are

improperly removed or installed, the keyboard may not function properly.

■ Cleaning under a key may be done with a swab moistened with isopropyl alcohol and

squeezed out. Be careful not to wipe away lubricants necessary for proper key functions. Use tweezers to remove any fibers or dirt in confined areas. Allow the parts to air dry before reassembly.

5.3.4 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 Section 5.3.2, “Cleaning the Computer

Case.”

5.3.5 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 Section 5.3.2, “Cleaning the Computer

Case.”

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Identifying the Chassis, Routine Care, and Disassembly Preparation

5.4 Service Considerations

Listed below are some of the considerations that you should keep in mind during the disassembly and assembly of the computer.

5.4.1 Tools and Software Requirements

To service the computer, you need the following:

■ Torx T-15 screwdriver (Compaq 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)

■ Diagnostics software

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

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

5.4.2 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.

Metric screws have a black finish.

✎

U.S. (Unified Standard) screws have a silver finish and are only used on hard drives.

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

✎

area to prevent damage.

Service Reference Guide 489243-001 5–7

Identifying the Chassis, Routine Care, and Disassembly Preparation

5.4.3 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.

5.4.4 Hard Drives

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

■ If a drive must be mailed, place the drive in a bubble-pack mailer or other suitable protective

packaging and label the package “Fragile: Handle With Care.”

■ Do not remove hard drives from the shipping package for storage. Keep hard drives in their

protective packaging until they are actually mounted in the system unit.

■ Avoid dropping drives from any height onto any surface.

■ If you are inserting or removing a hard drive, turn off the computer. Do not remove a hard

drive while the computer is on or in standby mode.

■ Before handling a drive, ensure that you are discharged of static electricity. While handling a

drive, avoid touching the connector. For more information about preventing electrostatic damage, refer to

■ Do not use excessive force when inserting a drive.

■ Avoid exposing a hard drive to liquids, temperature extremes, or products that have magnetic

fields such as monitors or speakers.

Section 5.2, “Electrostatic Discharge Information.”

5.4.5 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).

CAUTION: Batteries, battery packs, and accumulators should not be disposed of together with the general household waste.

5–8 489243-001 Service Reference Guide

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.

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

✎

6.1 Preparation for Disassembly

See Chapter 5, “Identifying the Chassis, Routine Care, and Disassembly Preparation,” for initial procedures.

1. Close any open software applications.

2. Exit the operating system.

3. Remove any diskette or compact disc from the computer.

4. Turn off the computer and any peripheral devices that are connected to it.

CAUTION: Turn off the computer before disconnecting any cables.

CAUTION: 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.

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

6. Disconnect all peripheral device cables from the computer.

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.

Service Reference Guide 489243-001 6–1

Removal and Replacement Procedures— Microtower (MT) Chassis

6.2 Remove the computer access panel and front bezel MT chassis)

(

6.2.1 Access Panel (MT Chassis)

1. Prepare the computer for disassembly (Section 6.1, “Preparation for Disassembly”).

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. Disconnect the power cord from the computer and from the power source.

3. Remove the screw that secures the access panel to the computer chassis 1.

4. Slide the access panel back about 10 mm (3/8 inch), then lift it away from and off the unit 2.

To replace the access panel, reverse the removal steps.

6–2 489243-001 Service Reference Guide

6.2.2 Front Bezel (MT Chassis)

1. Prepare the computer for disassembly (Section 6.1, “Preparation for Disassembly”).

2. Remove the access panel (Section 6.2.1, “Access Panel (MT Chassis)”).

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.

Removal and Replacement Procedures— Microtower (MT) Chassis

* These apply for selected models and countries only.

4. Continue to rotate the bezel, then push the bezel to the bottom to release the top latches from chassis.

To reinstall the front bezel, reverse the removal procedure.

5. Insert the three hooks on the left side of the bezel into the slots on the chassis and rotate the bezel on from left to right 1 so that it snaps in place.

* These apply for selected models and countries only.

Service Reference Guide 489243-001 6–3

Removal and Replacement Procedures— Microtower (MT) Chassis

6.3 Front Drive Bezels

1. Prepare the computer for disassembly (Section 6.1, “Preparation for Disassembly”).

2. Remove the access panel and the front bezel - MT (Section 6.2.1, “Access Panel (MT

Chassis)” and Section 6.2.2, “Front Bezel (MT Chassis)”).

6.3.1 Removing a 5.25" Drive Bezel Blank/MT Chassis

If the computer was not shipped with a drive in the 5.25" option bay, the bay will be covered by a bezel blank. If you add a drive to the option bay, you must first remove the bezel blank.

1. Turn off the computer properly through the operating system and turn off any external devices.

2. Disconnect the power cord from the power outlet and the computer, and disconnect any external devices.

3. Remove the access panel and front bezel. Refer to Section 6.2, “Remove the computer access

panel and front bezel (MT chassis)” .

4. While facing the inside of the front bezel, press the two retaining tabs on the right towards the outer edge of the bezel 1 and pull the bezel blank inwards to remove it 2..

Removing a Bezel Blank

To install a bezel blank, slide the left side of the blank into the two retainer slots on

✎

the left side of the front bezel then snap the right side of the blank into place.

6–4 489243-001 Service Reference Guide

Removal and Replacement Procedures— Microtower (MT) Chassis

6.4 Memory

For more information on the memory in this series of computers, refer to Appendix E, “Memory.”

6.4.1 Installing Memory Modules/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.

CAUTION: 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 Chapter 5 for more information.

CAUTION: 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 (Section 6.1, “Preparation for Disassembly”).

2. Remove the access panel (Section 6.2, “Remove the computer access panel and front bezel

(MT chassis)”).

WARNING: To reduce risk of personal injury from hot surfaces, allow the internal system components to

cool before touching.

3. Lay the computer down on its side to make it easier to work on.

4. Open both latches of the memory module socket 1, and insert the memory module into the socket 2. Begin by installing a module into the socket

module, and install the modules following the numerical order of the sockets.

second nearest the preinstalled

Service Reference Guide 489243-001 6–5

Removal and Replacement Procedures— Microtower (MT) Chassis

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

✎

on the memory socket.

5. Push the module down into the socket, ensuring that the module is fully inserted and properly seated. Make sure the latches are in the closed position 3.

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

To reassemble the computer, reverse the removal procedure.

6.5 Expansion Cards

6.5.1 Expansion Slot Cover Lock

1. Prepare the computer for disassembly (Section 6.1, “Preparation for Disassembly”).

2. Remove the right access panel (Section 6.2, “Remove the computer access panel and front

bezel (MT chassis)”).

3. Lay the computer down on its side to make it easier to work on.

4. On the rear of the computer, remove the retaining screw 1 then, slide the slot cover lock up 2 to access the expansion slot cover.

To reinstall the slot cover lock, reverse the removal procedure.

6–6 489243-001 Service Reference Guide

Removal and Replacement Procedures— Microtower (MT) Chassis

6.5.2 PCI/PCIe Expansion Card

To remove an expansion card continue with step 1.

To install an expansion card in an existing empty slot go to step 9.

1. Prepare the computer for disassembly (Section 6.1, “Preparation for Disassembly”).

2. Remove the right access panel (Section 6.2, “Remove the computer access panel and front

bezel (MT chassis)”).

3. Lay the computer down on its side to make it easier to work on.

4. Remove the slot cover lock (Section 6.5.1, “Expansion Slot Cover Lock”)

5. Disconnect any cables attached to the expansion card.

6. 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 other components.

7. Store the card in anti-static packaging.

8. Install a new expansion card or an expansion slot cover to close the open slot.

If not installing a replacement expansion card, skip to step 10.

To install an expansion card in an empty slot continue with step 9.

9. With the card aligned so the mounting bracket will fit firmly against the computer backwall place

When you install an expansion card, make sure you press firmly on the card so that the entire

✎

connector seats properly in the expansion card socket.

1, slide the expansion card into the expansion socket and press it firmly into

10. Reinstall the slot cover lock and its retaining screw.

11. Replace the access panel.

12. Connect external cables to the installed card, if needed.

Reconfigure the computer, if necessary.

Service Reference Guide 489243-001 6–7

Removal and Replacement Procedures— Microtower (MT) Chassis

6.5.3 Installing an Expansion Card

The computer has four PCI expansion slots. Each slot can accommodate a half-height PCI or PCI Express expansion card up to 6.6 inches (16.764 cm) in length.

You can install a PCI card or a PCI Express x1, x16 expansion card in each expansion slot.

✎

To install an expansion card:

1. Turn off the computer properly through the operating system, then turn off any external devices.

2. Disconnect the power cord from the power outlet and disconnect any external devices.

3. Remove the computer access panel.

4. Identify the slot into which you want to insert the expansion card.

5. If you are installing an expansion card in a vacant socket, remove the appropriate expansion slot cover on the back of the chassis.

6. Pull the slot cover straight up from the socket then away from the inside of the chassis.

Removing the Expansion Slot Cover

6–8 489243-001 Service Reference Guide

Removal and Replacement Procedures— Microtower (MT) Chassis

7. Hold the card just above the expansion slot 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. Gently press the card straight down into the expansion slot on the system board.

Be sure not to scrape other components in the chassis when installing an expansion card.

✎

Installing an Expansion Card

8. Fix the screw to secure the expansion card in place.

9. If you are not replacing the old expansion card with a new expansion card, install an

expansion slot cover to close the open slot. Insert the metal slot cover in the open slot, then push the expansion slot latch down to secure the slot cover in place.

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

slot (for example, with a metal slot cover or a piece of duct tape) for proper cooling of internal components during operation.)

Service Reference Guide 489243-001 6–9

Removal and Replacement Procedures— Microtower (MT) Chassis

6.5.4 Removing an Expansion Card

To remove an expansion card:

1. Turn off the computer properly through the operating system, then turn off any external devices.

2. Disconnect the power cord from the power outlet and disconnect any external devices.

3. Remove the computer cover.

4. Release the slot cover retention latch on the back of the computer that secures the PCI slot covers by pulling the latch up.

5. Carefully rock the card back and forth until the connectors pull free from the socket. Pull the expansion card straight up from the socket then away from the inside of the chassis. Be sure not to scrape the card against the other components.

6. Store the 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.

8. Push the expansion slot cover latch down to secure the expansion cards and expansion slot covers.

CAUTION: All expansion card slots on the rear of the computer must contain either an expansion card

or slot cover for proper cooling of internal components during operation.

6–10 489243-001 Service Reference Guide

Removal and Replacement Procedures— Microtower (MT) Chassis

6.6 Cable Management

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

■ Keep cables away from major heat sources like the heatsink.

■ Do not jam cables on top of expansion cards or memory modules.Printed circuit cards like

these are not designed to take excessive pressure on them.

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

wires.

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

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

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

■ Never crease a SATA data cable.

■ Do not rely on components like the drive cage, power supply, or computer cover to push

cables down into the chassis. Always position the cables to lay properly by themselves.

When removing the power supply power cables from the P1 or P5 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.

Service Reference Guide 489243-001 6–11

Removal and Replacement Procedures— Microtower (MT) Chassis

6.7 Drives

The computer supports up to four drives that may be installed in various configurations.

This Section describes the procedure for replacing or upgrading the storage drives. A Torx T-15 screwdriver is needed to remove and install the guide screws on a drive.

CAUTION: Make sure personal files on the hard drive are backed up to an external storage device

before removing the hard drive. Failure to do so will result in data loss. After replacing the primary hard drive, you will need to run the Restore Plus! CD to load the Compaq factory-installed files.

6.7.1 Locating Drive Positions

* These apply for selected models and countries only.

Drive Positions

6–12 489243-001 Service Reference Guide

Item Description

1 First 5.25-inch, half-height bays for optional drives

Second 5.25-inch, half-height bays for optional drives

2 One standard 3.5-inch, one-third height bays (1.44-MB diskette drive shown)

3 One internal 3.5-inch, one-third height bays for hard drives

An internal 3.5-inch bracket kit for second hard drives is available as option.

6.7.2 Removing a Drive

1. Turn off the computer properly through the operating system and turn off any external devices. Disconnect the power cord from the power outlet and disconnect any external devices.

2. Remove the access panel and front bezel.

3. Disconnect the power and data cables from the back of the drive, as indicated in the following illustrations.

Removal and Replacement Procedures— Microtower (MT) Chassis

Drive Positions

4. Remove all the screws that secures the drives in the drive bay. Slide the drive disk forward and out of the bay.

* These apply for selected models and countries only.

Removing the Drives

Service Reference Guide 489243-001 6–13

Removal and Replacement Procedures— Microtower (MT) Chassis

5. Removing the Hard Disk: remove the two screws that secure the hard disk drive cage to the chassis.

Removing the Hard disk

6. 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.

Releasing the Hard Drive Cage

6–14 489243-001 Service Reference Guide

Removal and Replacement Procedures— Microtower (MT) Chassis

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

Removing the Hard Drive Cage

8. Disconnect the power cable 1 and data cable 2 from the back of the hard drive.

Disconnecting the Hard Drive Cables

Service Reference Guide 489243-001 6–15

Removal and Replacement Procedures— Microtower (MT) Chassis

9. 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.

Removing the Hard Drive

10. Remove one guide screws (Floppy Drive only) from the old drive. You will need these screws to install a new drive.

WARNING: There may be sharp edges on the insides of the bay opening after the shield has been

removed.

6–16 489243-001 Service Reference Guide

Removal and Replacement Procedures— Microtower (MT) Chassis

6.8 Front I/O Panel Housing Assembly - MT chassis

1. Prepare the computer for disassembly (Section 6.1, “Preparation for Disassembly”).

2. Remove the access panel and rotate the computer so the system board is parallel to the table to make it easier to work on (

3. Disconnect two attaching cables from the system board: the power switch/LED cable, and the front USB cable.

4. Remove the two screws 1 that secure the housing to the chassis and then pull the housing 2 away from the chassis.

Section 6.1, “Preparation for Disassembly”).

To install the housing assembly, reverse the removal procedures.

Service Reference Guide 489243-001 6–17

Removal and Replacement Procedures— Microtower (MT) Chassis

6.9 System Fan

1. Prepare the computer for disassembly (Section 6.1, “Preparation for Disassembly”).

2. Remove the access panel (Section 6.2, “Remove the computer access panel and front bezel

(MT chassis)”).

3. Disconnect the cable that connects the system fan to the system board.

4. Remove the four screws that secure the fan to the chassis and remove the fan.

To install the fan, reverse the removal procedures.

Note: Similar installtion procedure is lying on SFF for System Fan.

6–18 489243-001 Service Reference Guide

Removal and Replacement Procedures— Microtower (MT) Chassis

6.10 Heatsink - MT chassis

1. Prepare the computer for disassembly (Section 6.1, “Preparation for Disassembly”).

2. Remove the access panel (Section 6.2, “Remove the computer access panel and front bezel

(MT chassis)”).

3. Lay the computer down on its side to make it easier to work on.

4. Disconnect the 4-pin power cable from the system board to make it easier to access the heatsink.

5. Disconnect the heatsink control cable from the system board.

6. Loosen the four captive screws that secure the heatsink to the system board.

7. Lift the heatsink from atop the processor and set it on its side to keep from contaminating the work area with thermal grease.

When reinstalling an existing heatsink, make sure that its bottom has been cleaned with an alcohol wipe and fresh thermal grease has been applied to the top of the processor. New heatsinks come from the factory with fresh thermal grease already applied.

Position the heatsink so that fan wiring is closest to the memory module. Check to ensure that the heatsink mounting lugs do not rest on any electrical components before tightening the retaining screws.

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

evenly seat the heatsink to 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.

The difference of mounting PCA into chassis between MT and SFF is minor, refer to different shape chassis.

Service Reference Guide 489243-001 6–19

Removal and Replacement Procedures— Microtower (MT) Chassis

6.11 Processor

1. Prepare the computer for disassembly (Section 6.1, “Preparation for Disassembly”).

2. Remove the access panel cover (Section 6.2, “Remove the computer access panel and front

bezel (MT chassis)”).

3. Disconnect the heatsink control cable from the system board and remove the heatsink.

Section 6.10, “Heatsink - MT chassis”

4. Rotate the processor locking lever to its full open position.

5. Carefully lift the processor from the socket.

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.

CAUTION: The heatsink must be installed within 24 hours of installing the processor to prevent damage

to the processor’s solder connections.

To install a new processor:

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

2. Secure the locking lever.

If reusing the existing heatsink, go to step 3.

If using a new heatsink, go to step 6.

3. If reusing the existing heatsink, clean the bottom of the heatsink with the alcohol pad provided in the spares kit.

4. Apply the thermal grease provided in the spares kit to the top of the processor and install the heatsink atop the processor.

5. Go to step 7.

6–20 489243-001 Service Reference Guide

Removal and Replacement Procedures— Microtower (MT) Chassis

6. If using a new heatsink, remove the protective covering from the bottom of the heatsink and place it in position atop the processor.

7. Secure the heatsink to the system board and system board tray with the 4 captive screws and attach the heatsink control cable to the system board.

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

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

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 ROMPaq can be found on the Web at: http:\\h18000.www1.hp.com/support/files.

Service Reference Guide 489243-001 6–21

Removal and Replacement Procedures— Microtower (MT) Chassis

6.12 System Board

1. Prepare the computer for disassembly (Section 6.1, “Preparation for Disassembly”).

2. Remove the access panel (Section 6.2, “Remove the computer access panel and front bezel

(MT chassis)”).

3. Remove the front bezel (Section 6.2.2, “Front Bezel (MT Chassis)”).

4. Disconnect the power, and data cables from the back of all installed drives.

5. Disconnect all cables from the system board.

6. Remove the heatsink from the system board (Section 6.10, “Heatsink - MT chassis”).

7. Remove the 6 screws that secure the system board to the chassis.

8. Slide the system board towards the front of the chassis then, angle the back of the board up to remove it.

The system board in the computer may look slightly different from the one shown here.

✎

To install the system board, reverse the removal procedure.

6–22 489243-001 Service Reference Guide

6.13 Battery

The battery that comes with your computer provides power to the real-time clock and has a lifetime of about three years. When replacing the battery, use a battery equivalent to the battery originally installed on the computer. The computer comes with a 3-volt lithium coin cell battery.

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.

WARNING: This 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 140°F (60°C)

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

water.

■ Replace the battery only with the HP/Compaq 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 the Troubleshooting Guide for information on backing up the CMOS settings.

Removal and Replacement Procedures— Microtower (MT) Chassis

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/Compaq, their authorized partners, or their agents.

CAUTION: 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.

1. Prepare the computer for disassembly (Section 6.1, “Preparation for Disassembly”).

2. Remove the right access panel (Section 6.2, “Remove the computer access panel and front

bezel (MT chassis)”).

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.

Service Reference Guide 489243-001 6–23

Removal and Replacement Procedures— Microtower (MT) Chassis

6.13.1 Battery Holder

1. To release the battery from its holder, squeeze the metal clamp that extends above one edge of the battery. When the battery pops up, lift it out 1.

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.

3. Replace the computer access panel.

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

5. Reset the date and time, your passwords, and any special system setups, using Computer

Setup. Refer to the Computer Setup (F10) Utility Guide.

6–24 489243-001 Service Reference Guide

6.14 Power Supply

WARNING: Voltage is always present on the system board when the computer is plugged into an

active AC outlet. To avoid possible personal injury and damage to the equipment the power cord should be disconnected from the computer and/or the AC outlet before opening the computer.

1. Prepare the computer for disassembly (Section 6.1, “Preparation for Disassembly”).

2. Remove the access panel (Section 6.2, “Remove the computer access panel and front bezel

(MT chassis)”).

3. Disconnect all power cables from the mass storage devices and from the system board.

4. Remove the 4 screws 1 that secure the power supply to the chassis.

5. Slide the power supply toward the front of the computer 4, then lift it out of the computer.

Removal and Replacement Procedures— Microtower (MT) Chassis

To install the power supply, reverse the removal procedure.

Service Reference Guide 489243-001 6–25

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.

Enhanced Keyboard

Connector and Icon Pin Signal

Connector Pin Assignments

Mouse

Connector and Icon Pin Signal

Ethernet RJ-45

Connector and Icon Pin Signal

1 2 3

4 5 6

1 2 3

4 5 6

1 2 3 4

Data Unused Ground

+5 VDC Clock Unused

Data Unused Ground

+5 VDC Clock Unused

(+) Transmit Data (-) Transmit Data (+) Receive Data Unused

Service Reference Guide 489243-001 A–1

5 6 7 8

Unused (-) Receive Data Unused Unused

Connector Pin Assignments

Parallel Interface

Connector and Icon

Pin Signal Pin Signal Pin Signal

1 2 3

4 5 6

Strobe Data Bit 0 Data Bit 1

Data Bit 2 Data Bit 3 Data Bit 4

7 8 9

10 11 12

Data Bit 5 Data Bit 6 Data Bit 7

Acknowledge Busy Paper End

Serial Interface, Powered and Non-Powered

Connector and Icon Pin Signal

1 2 3

4 5 6

7 8 9

USB

Connector and Icon Pin Signal

13 14 15

16 17 18-25

Select Auto Linefeed Error

Initialize Printer Select IN Signal Ground

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)

Microphone

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

A–2 489243-001 Service Reference Guide

1 2 3 4

+5 VDC

- Data + Data Ground

1 (Tip) Audio

2 (Ring) Power

3 (Shield) Ground

Headphone

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

1 (Tip) Audio_Left

2 (Ring) Audio_Right

3 (Shield) Ground

Line-In Audio

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

1 (Tip) Audio_In_Left

2 (Ring) Audio_In_Right

3 (Shield) Ground

Line-Out Audio

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

1 (Tip) Audio_Out_Left

2 (Ring) Audio_Out_Right

Connector Pin Assignments

3 (Shield) Ground

Monitor

Connector and Icon

Pin Signal Pin Signal Pin Signal

1 2 3

4 5

Red Analog Green Analog Blue Analog

Not used Ground

6 7 8

9 10

Ground Ground Ground

+5V DC (fused) Ground

11 12 13

14 15

Not used DDC Serial Data Horizontal Sync

Vertical Sync DDC Serial Clock

Service Reference Guide 489243-001 A–3

Connector Pin Assignments



24-Pin Power

Connector

Pin Signal Pin Signal Pin Signal Pin Signal

1 2 3 4 5 6 7

+3.3 V +3.3 V GND +5 V GND +5 V GND

8 9 10 11 12 13 13-1

P. G +5 VSB +12 V +12 V +3.3 V +3.3 V +3.3 VS

14 15 16 17 18 19 20

-12 V GND PSON GND GND GND NI

21 22 23 24

+5 V +5 V +5 V GND

4-Pin Power (for CPU)

Connector and Icon Pin Signal

1 GND

2 GND

3 +12 V

4 +12 V

A–4 489243-001 Service Reference Guide

The voltage select switch feature on the computer permits it to operate from any line voltage between 100-127 or 220-240 volts AC.

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. For more information on power cord set requirements, contact your authorized HP dealer, reseller, or service provider.

General Requirements

The requirements listed below are applicable to all countries:

1. The length of the power cord set must be at least 1.8 m (6.00 feet) and a maximum of 3.0 m (9.75 feet.)

2. All power cord sets must be approved by an acceptable accredited agency responsible for evaluation in the country where the power cord set will be used.

Power Cord Set Requirements

3. The power cord set must have a minimum current capacity of 10A and a nominal voltage rating of 115 to 230 volts AC, as required by each country’s power system.

4. The appliance coupler must meet the mechanical configuration of an EN 60 320/IEC 320 Standard Sheet C13 connector, for mating with appliance inlet on the Switch Box.

Service Reference Guide 489243-001 B–1

POST Error Messages

An error message results if the Power-On Self-Test (POST) encounters a problem. This test runs when the system is turned on, checking assemblies within the computer and reporting any errors found.

Not all computers use all of the codes listed.

Recommended Actions are to be taken in incremental steps. Perform one step at a time and continue only if the action does not cure the problem.

POST Error Messages

Screen Message Probable Cause Recommended Action

BIOS ROM checksum error - System halted

CMOS battery failed The CMOS battery is no

CMOS checksum error Defaults loaded

CPU at xxxx Displays the running

Press ESC to skip memory test

HARD DISK INSTALL FAILURE

The checksum of the BIOS code in the BIOS chip is incorrect, indicating the BIOS code may have become corrupt.

longer functional.

Checksum of CMOS is incorrect, so the system loads the default equipment configuration. A checksum error may indicate that CMOS has become corrupt. A weak battery may have caused this error.

speed of the CPU.

A remind message, not an error.

Cannot find or initialize the hard drive controller or the drive.

Replace the BIOS

Replacement battery.

Check the battery and replace if necessary.

Not an error, no action request

The user may press Esc to skip the full memory test.

Make sure the controller is installed correctly. If no hard drives are installed, be sure the Hard Drive selection in Setup is set to NONE.

Service Reference Guide 489243-001 C–1

POST Error Messages

Screen Message Probable Cause Recommended Action

Keyboard error or no keyboard present

Cannot initialize the keyboard.

Memory Test: This message displays

during a full memory test, counting down the memory areas being tested.

Memory test fail If POST detects an error

during memory testing, additional information appears giving specifics about the type and location of the memory error.

Override enabled Defaults loaded

If the system cannot boot using the current CMOS configuration, the BIOS can override the current configuration with a set of BIOS defaults designed for the most stable, minimal-performance system operations.

Make sure the keyboard is attached correctly and no keys are pressed during POST. To purposely configure the system without a keyboard, set the error halt condition in Setup to HALT ON ALL, BUT KEYBOARD. The BIOS then ignores the missing keyboard during POST.

No action request

Reseat memory modules. Replace memory modules.

Restart the computer, use the F10 Key to access Computer Setup. Select Load Default Settings > Save and Exit.

C–2 489243-001 Service Reference Guide

POST Error Messages

Screen Message Probable Cause Recommended Action

Error: Non-System disk or disk error

Replace and press any key when ready

Warning: CPU Fan has failed. For Thermal Protection, System will be shut down. Please contact Service Centre.

The BIOS was unable to find a suitable boot device. For Argali, this may mean an uninitialized or corrupt ATA flash.

CPU Fan weak (RPM < 500) or not turning, Display Warning message and Long Beep for 5 sec and shut down.

Reseat the device data and power cables.

Replace the device data cable. Replace the device. Replace the system board.

1. Ensure that the computer air vents are not blocked and the processor cooling fan is running.

2. Open hood, press power button, and see if the processor fan spins. If the processor fan is not spinning, make sure the fan's cable is plugged onto the system board header. Ensure the fan is fully/properly seated or installed.

3. If fan is plugged in and seated properly, but is not spinning, then replace processor fan.

4. Reseat processor heatsink and verify that the fan assembly is properly attached.

5. Contact an authorized reseller or service provider.

Warning: System Fan has failed. For Thermal Protection, System will be shut down. Please contact Service Centre.

System Fan weak (RPM < 700) or not turning, Display Warning message and Long Beep for 5 sec and shut down.

1. Ensure that the computer air vents are not blocked and the processor cooling fan is running.

3. If fan is plugged in and seated properly, but is not spinning, then replace processor fan.

4. Reseat processor heatsink and verify that the fan assembly is properly attached.

5. Contact an authorized reseller or service provider.

Service Reference Guide 489243-001 C–3

Troubleshooting Without Diagnostics

Preliminary Checklist

This section describes some simple, preliminary tests and guidelines for troubleshooting the computer without using the diagnostics.

■ Are the computer and monitor connected to a working electrical outlet?

■ Is the voltage select switch is set to the appropriate voltage for your region (115V or 230V)?

■ Is the computer turned on?

■ Is the green power light illuminated?

■ Is the monitor turned on?

■ Is the green monitor light illuminated?

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

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

(embedded video on select models only) 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 (F10) Setup.

■ Press and hold any key. If the system beeps, then the keyboard is operating correctly.

■ Check all cables for loose or incorrect connections.

■ Reconfigure the computer after installing a non–Plug and Play expansion board or other

option, such as a diskette drive.

■ Are all of the necessary device drivers installed?

■ Have all printer drivers been installed for each application?

■ Remove all diskettes from the diskette drives before you turn on the system.

■ Are all switches set correctly?

■ Is the NIC Remote Wakeup cable (featured on some models) connected between the NIC and

the riser/system board?

Service Reference Guide 489243-001 D–1

Troubleshooting Without Diagnostics

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.

Problem Cause Solution

Computer will not turn

on.

Cables to the external power source are unplugged.

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

A defective PCI card has been installed.

Drive data or power supply cables may properly connected.

The unit temperature was exceeded. The fan may be blocked.

not be

Ensure that cables connecting the computer to the external power source are plugged in properly and the wall outlet is active.

Select the proper AC voltage using the slide switch.

Remove any expansion board that was just installed.

Reseat drive data and power supply cables.

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.

Computer will not respond to USB keyboard or mouse.

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.

D–2 489243-001 Service Reference Guide

Software control of the power switch is not functional.

Computer is in

standby

Keyboard or mouse is not connected to computer.

System has locked up. Restart the computer.

mode.

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.

Press the power button to resume from standby mode.

Connect keyboard and mouse cables to computer.

Troubleshooting Without Diagnostics

Problem Cause Solution

Computer date and time display is incorrect.

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

Poor performance is experienced.

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

MConnecting the

✎

computer to a live AC outlet prolongs the life of the

battery.

RTC

First, reset the Date and Time Properties in the 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 on the Library CD for instructions on installing a new battery.

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.

Processor is hot. 1. Ensure airflow to the computer is

not blocked. Leave a 4-inch (10.2cm) clearance on all vented sides of the computer and monitor to permit required airflow.

2. Ensure fans are connected and working properly (some fans only operate when needed).

3. Ensure the processor heatsink is installed properly.

Poor performance is experienced (continued).

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 is fragmented. Defragment hard drive.

Program previously

Restart the computer. accessed did not release reserved memory back to the system.

Virus resident on the hard

Run the virus protection program. drive.

Too many applications running.

1. Close unnecessary applications to free up memory.

2. Add more memory.

Service Reference Guide 489243-001 D–3

Troubleshooting Without Diagnostics

Problem Cause Solution

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

Cause unknown. Restart the computer.

Blank screen (no video). Monitor is not turned on

and the monitor light is not

on.

The cable connections are not correct.

Blank screen (no video) (continued).

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

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.

Turn on the monitor and check that the monitor light is on.

Check the cable connection from the monitor to the computer and to the electrical outlet.

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

Computer is in 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

Power LED is flashing and computer will not start.

monitor and it at the resolution chosen.

The VGA/BNC selector switch on the monitor (some models) is not properly set.

Bad monitor. Try a different monitor.

Initernal error has occurred and the computer is flashing a code.

will not sync

Press the power button to resume from standby mode.

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

Set the selector switch to agree with the cable connection.

Refer to “Interpreting Diagnostic Lights

and Audible Codes” to interpret the

error code.

D–4 489243-001 Service Reference Guide

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, Windows XP Home/ Professional will automatically recognize the device and configure the computer. If you install a non–plug and play device, you must reconfigure the computer after completing installation of the

new hardware. In Windows XP and Vista, use the Add Hardware Wizard and follow the

instructions that appear on the screen.

Problem Cause Solution

Troubleshooting Without Diagnostics

A new device is not recognized as part of the

system.

Device is not seated or connected properly.

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

Power switch of new external device is not turned on.

When the system advised you of changes to the configuration, you did

not accept them.

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

Ensure that the device is properly and securely connected and that pins in the connector are not bent down.

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

Turn off the computer, turn on the external device, then turn on the computer to integrate the device with the computer system.

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

Use Windows XP 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.

Computer will not start. Wrong memory modules

Service Reference Guide 489243-001 D–5

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. Observe the beeps and LED lights on the front of the computer. See

Diagnostic Lights and Audible Codes” to determine possible

causes.

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

“Interpreting

Troubleshooting Without Diagnostics

Interpreting Diagnostic Lights and Audible Codes

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

If you see flashing LEDs on a PS/2 keyboard, look for flashing LEDs on the front panel of the

✎

computer and refer to the following table to determine the front panel LED codes.

Recommended actions in the following table are listed in the order in which they should be

✎

performed.

Replace the system board or power supply only as the last resort.

✎

D–6 489243-001 Service Reference Guide

Solving Display Problems

Problem Cause Solution

Troubleshooting Without Diagnostics

Blank screen (no video). The cable connections

are not correct.

Screen blanking utility installed or energy saver features enabled.

System ROM is bad; system is running in FailSafe Boot Block mode (indicated by eight beeps).

Fixed-sync monitor will not sync at the resolution chosen.

Computer is in

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 your data.

Monitor cable plugged into the wrong connector.

Check the cable connections from the monitor to the computer and to the electrical outlet.

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

Reflash the ROM using a ROMPaq diskette.

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

Press the power button to resume from standby mode.

If the computer system has both an

integrated graphics connector and an AGP card connector, plug the monitor cable into the AGP card connector.

Monitor settings in the computer are not compatible with the monitor.

Service Reference Guide 489243-001 D–7

1. Restart the computer and press

F8 during startup when you see “Press F8” in the bottom right corner of the screen.

2. Using the keyboard arrow keys,

select Enable VGA Mode and press Enter.

3. In Windows Control Panel,

double-click the Display icon and select the Settings tab.

4. Use the sliding control to reset the resolution.

Troubleshooting Without Diagnostics

Solving Display Problems (Continued)

Problem Cause Solution

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

Pre-video graphics error.

For systems with a graphics card:

1. Reseat the graphics card.

2. Replace the graphics card.

3. Replace the system board.

For systems with integrated graphics, replace the system board.

Monitor does not function properly when used with energy saver features.

Monitor without energy saver capabilities is being used with energy saver features enabled.

Dim characters. The brightness and

contrast controls are not set properly.

Cables are not properly connected.

Blurry video or requested resolution cannot be set.

If the graphics controller was upgraded, the correct video drivers may not be loaded.

Monitor is not capable of displaying requested resolution.

The picture is broken up, rolls, jitters, or flashes.

The monitor connections may be incomplete or the monitor may be incorrectly adjusted.

Disable monitor energy saver feature.

Adjust the monitor brightness and contrast controls.

Check that the graphics cable is securely connected to the graphics card and the monitor.

Install the video drivers included in the upgrade kit.

Change requested resolution.

1. Be sure the monitor cable is securely connected to the computer.

2. In a two-monitor system or if another monitor is in close proximity, be sure the monitors are not interfering with each other’s electromagnetic field by moving them apart.

3. Fluorescent lights or fans may be too close to the monitor.

Vibrating or rattling noise coming from inside a CRT monitor when powered on.

Clicking noise coming from inside a CRT monitor.

D–8 489243-001 Service Reference Guide

Monitor needs to be degaussed.

Monitor degaussing coil has been activated.

Electronic relays have been activated inside the monitor.

Degauss the monitor.

None. It is normal for the degaussing coil to be activated when the monitor is powered on.

None. It is normal for some monitors to make a clicking noise when turned on and off, when going in and out of standby mode, and when changing resolutions.

Solving Display Problems (Continued)

Problem Cause Solution

High pitched noise coming from inside a flat panel monitor.

Brightness and/or contrast settings are too high.

Lower brightness and/or contrast settings.

Troubleshooting Without Diagnostics

Fuzzy focus; streaking, ghosting, or shadowing effects; horizontal scrolling lines; faint vertical bars; or unable to center the picture on the screen. (flat panel monitors using an analog VGA input connection only)

Certain typed symbols do not appear correct.

Flat panel monitor’s internal digital conversion circuits may be unable to correctly interpret the output synchronization of the graphics card.

The font you are using does not support that particular symbol.

1. Select the monitor’s AutoAdjustment option in the monitor’s on-screen display menu.

2. Manually synchronize the Clock and Clock Phase on-screen display functions.

NOTE: Use the monitor model number when searching for the SoftPaq.

Use the Character Map to locate the and select the appropriate symbol. Click Start > All Programs >

Accessories > System Tools > Character Map. You can copy

the symbol from the Character Map into a document.

Service Reference Guide 489243-001 D–9

Troubleshooting Without Diagnostics

Solving Audio Problems

Problem Cause Solution

Sound does not come out

of the speaker or

headphones.

Software volume control is turned down.

The external speakers are not turned on.

External speakers plugged into the wrong audio jack.

Audio cable not connected.

Digital CD audio is not enabled.

Double-click the Speaker icon on the taskbar and use the volume slider to adjust the volume.

Turn on the external speakers.

See the sound card documentation for proper speaker connection.

Connect audio cable between CD or DVD-ROM drive and the system board.

Enable digital CD audio:

1. From the Control Panel, select System.

2. On the Hardware tab, click the Device Manager button.

3. Right-click on the CD/DVD device and select Properties.

4. On the Properties tab, make sure “Enable digital CD

audio for this CD-ROM device” is checked.

Headphones or devices connected to the lineout connector mute the internal speaker.

Volume is muted. 1. From the Control Panel

Computer is in

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 your data.

D–10 489243-001 Service Reference Guide

Turn on and use headphones or external speakers, if connected, or disconnect headphones or external speakers.

program, click Sound,

Speech and Audio Devices, then click Sounds and Audio Devices.

2. Click the Mute check box to

remove the check mark from the

box.

Press the power button to resume from standby mode.

Troubleshooting Without Diagnostics

Solving Audio Problems (Continued)

Problem Cause Solution

Noise or no sound comes out of the speakers or headphones.

If you set digital as the Output Mode, the internal speaker and external analog

✎

speakers will no longer output audio until you switch back to an auto-sense or analog mode.

If you set analog as the Output Mode, external digital speakers will not function until you change the output mode back to an auto-sense or digital mode.

1. If using digital speakers that have a stereo jack and want the system to auto-switch to digital, use a stereo-to-mono adapter to

properly engage the autosense feature or use the multimedia device properties to

manually switch the audio signal from analog to digital.

2. If the headphones have a mono jack, use the multimedia device properties to switch the system to analog out.

Sound cuts in and out. Processor resources are

being used by other open applications.

Computer appears to be locked up while recording audio.

The hard disk may be full.

Shut down all open processorintensive applications.

1. Before recording, make sure there is enough free space on the hard disk.

2. Try recording the audio file in a compressed format.

Service Reference Guide 489243-001 D–11

Troubleshooting Without Diagnostics

Solving Printer Problems

Problem Cause Solution

Printer will not print. Printer is not turned on

and online.

The correct printer driver for the application are not installed.

If you are on a network, you may not have made the connection to printer.

Printer may have failed. Run printer self-test.

Printer will not turn on. The cables may not be

connected properly.

Printer prints garbled information.

The correct printer driver is not installed.

The cables may not be connected properly.

the

Turn the printer on and make sure it is online.

1. Install the correct printer driver for the application.

2. Try printing using the MSDOS

command:

DIR C:\ > [printer port]

where [printer port] is the address of the printer being used. If the printer works, reload the printer driver.

Make the proper network connections to the printer.

Reconnect all cables.

Install the correct printer driver for the application.

Reconnect all cables.

Printer memory may be overloaded.

Printer is offline. The printer may be out

of paper.

D–12 489243-001 Service Reference Guide

Reset the printer by turning it off for one minute, then turn it back on.

1. Check the paper tray and refill it if it

is empty.

2. Select online.

Solving Keyboard and Mouse Problems

Solving Keyboard Problems

Problem Cause Solution

Troubleshooting Without Diagnostics

Keyboard commands and typing are not recognized by the computer.

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 your data.

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

Mouse does not respond to movement or is too

slow.

Keyboard connector is

not properly

connected.

Program in use has stopped responding to

commands.

Keyboard needs repairs.

Computer is in standby mode.

The Num Lock key may

be on.

Mouse connector is not

properly plugged into the back of the computer.

1. Turn off the computer.

2. Reconnect the keyboard to the back of the computer and restart the computer.

Shut down the computer using the

mouse and then restart the

computer.

Replace the keyboard.

Press the power button to resume from standby mode.

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.

1. Shut down the computer using the keyboard.

2. Plug the mouse connector into the back of the computer (or the keyboard) and restart the computer.

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 your data.

Mouse will only move vertically or horizontally, or movement is jerky.

Service Reference Guide 489243-001 D–13

Program in use has stopped responding to

commands.

Mouse needs repairs. Replace the mouse.

Computer is in standby mode.

Mouse roller ball is dirty.

Shut down the computer using the keyboard and then restart the computer.

Press the power button to resume from standby mode.

Remove roller ball cover from the bottom of the mouse and clean it.

Troubleshooting Without Diagnostics

Solving Network Problems

These guidelines do not discuss the process of debugging the network cabling.

Solving Network Problems

Problem Cause Solution

Wake-on-LAN feature is not functioning.

Network driver does not

detect network

controller.

Network status link light does not turn on or it never flashes.

The network status

✎

light should flash when there is network activity.

Diagnostics reports a failure.

Wake-on-LAN is not enabled.

Network controller is disabled.

Incorrect network driver. Check the network controller

No active network is detected.

Network controller is not set up properly.

Network driver is not properly loaded.

System cannot autosense the network.

The cable is not securely connected.

Use the Network control application to enable Wake-on-LAN.

Run Computer Setup and enable network controller.

documentation for the correct driver or obtain the latest driver from the manufacturer’s Web site.

Check cabling and network equipment for proper connection.

Use the Network control application to verify that the device is properly.

Reinstall network drivers.

Disable auto-sensing capabilities and force the system into the correct operating mode.

Ensure that both ends of the data cable are securely connected.

working

The cable is attached to the incorrect connector.

There is a problem with the cable or a device at the other end of the cable.

Network controller interrupt is shared with an

expansion board.

The network controller is

defective.

Diagnostics passes, but the computer does not communicate with the network.

D–14 489243-001 Service Reference Guide

Network drivers are not

loaded, or driver parameters do not match current configuration.

Ensure that the cable is attached to the correct connector.

Ensure that the cable and device at the other end are operating correctly.

Under the Computer Setup Advanced menu, change the resource settings for the board.

Replace the NIC or replace the system board if the NIC is embedded.

1. Make sure the network drivers are

loaded and that the driver parameters match the configuration of the network controller.

2. Make sure the correct network client and protocol is installed.

Solving Network Problems (Continued)

Problem Cause Solution

Diagnostics passes, but the computer does not communicate with the network. (continued)

The network controller is

not configured for this

computer.

Select the Network icon in the Control Panel and configure the network controller.

Troubleshooting Without Diagnostics

Network controller stopped working when an expansion board was added to the computer.

Network controller stops working without apparent cause.

New network card will not boot.

Network controller interrupt is shared with an expansion board.

The network controller requires drivers.

The expansion board installed is a network card (NIC) and conflicts with the embedded NIC.

The files containing the network drivers are corrupted.

The cable is not securely connected.

The network controller is defective.

New network card may be defective or may not meet industry-standard specifications.

Under the Computer Setup Advanced menu, change the resource settings for the board.

Verify that the drivers were not accidentally deleted when the drivers for a new expansion board were installed.

Under the Computer Setup Advanced menu, change the resource settings for the board.

Reinstall the network drivers, using the Restore Plus! CD.

Ensure that both ends of the cable are securely attached to the correct devices.

Replace the NIC or replace the system board if the NIC is embedded.

Install a working, industry-standard NIC, or change the boot sequence to boot from another source.

Cannot connect to network server when attempting Remote System Installation.

System setup utility reports unprogrammed EEPROM.

Service Reference Guide 489243-001 D–15

The network controller is not configured properly.

Verify Network Connectivity, that a DHCP Server is present, and that the Remote System Installation Server contains the NIC drivers for your NIC.

Unprogrammed EEPROM. Flash the ROM.

Troubleshooting Without Diagnostics

Solving Memory Problems

CAUTION: For those systems that support ECC memory, HP does not support mixing ECC and non-ECC

memory. Otherwise, the system will not boot the operating system.

Solving Memory Problems

Problem Cause Solution

System will not boot or does not function properly after installing additional memory modules.

Memory module is not the correct type or speed or the new memory module is not seated properly.

Replace module with the correct industry-standard device for the computer.

ECC memory modules are not supported.

Out of memory error. Memory configuration

may not be set up correctly.

You have run out of memory to run the application.

Memory count during POST is wrong.

Insufficient memory error during operation.

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

The memory modules may not be installed correctly.

Too many Terminate and Stay Resident programs (TSRs) are installed.

You have run out of memory for the application.

Memory is installed incorrectly or is bad.

Use the Device Manager to check memory configuration.

Check the application documentation to determine the memory requirements.

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

Delete any TSRs that you do not

need.

Check the memory requirements for the application or add more memory to the computer.

1. Reseat DIMMs.

2. Replace DIMMs one at a time to isolate the faulty module.

3. Replace third-party memory with HP memory.

4. Replace the system board.

D–16 489243-001 Service Reference Guide

Solving Processor Problems

Problem Cause Solution

Troubleshooting Without Diagnostics

Poor performance is experienced.

Processor is hot. 1. Make sure the airflow to the

computer is not blocked.

2. Make sure the fans are connected and working properly (some fans only operate when needed).

3. Make sure the processor heatsink is installed properly.

Service Reference Guide 489243-001 D–17

Troubleshooting Without Diagnostics

Solving CD-ROM and DVD Problems

Problem Cause Solution

System will not boot from CD-ROM or DVD drive.

CD-ROM or DVD devices are not detected or driver is not loaded.

Movie will not play in the DVD drive.

Cannot eject compact disc (tray-load unit).

The CD-ROM or DVD boot is not enabled through the Computer Setup utility.

Non-bootable CD in drive.

Drive is not connected properly or not properly configured.

Movie may be regionalized for a different country.

Decoder software is not installed.

Disc not properly seated in the drive.

Run the Computer Setup utility and enable booting to removable media and verify boot order settings.

Try a bootable CD in the drive.

1. Reconnect power and data cables to the drive.

2. Install correct device driver.

See the documentation that came with the DVD drive.

Install decoder software.

1. Turn off the computer and insert a thin metal rod into the emergency eject hole and push firmly.

2. Slowly pull the tray out from the drive until the tray is fully extended, then remove the

disc.

CD-ROM, CD-RW, DVDROM, or DVD-R/RW drive cannot read a disc or takes too long to start.

CD has been inserted upside down.

The DVD-ROM drive takes longer to start because it has to determine the type of media played, such as audio or video.

CD or DVD disc is dirty. Clean CD or DVD with a CD

Windows does not detect the CD-ROM or DVD-ROM drive.

Re-insert the CD with the label facing up.

Wait at least 30 seconds to let the DVD-ROM drive determine the type of media being played. If the disc still does not start, read the other solutions listed for this topic.

cleaning kit.

1. Use Device Manager to remove or uninstall the device in question.

2. Restart the computer and let Windows detect the device.

D–18 489243-001 Service Reference Guide

Solving CD-ROM and DVD Problems (Continued)

Problem Cause Solution

Recording audio CDs is difficult or impossible.

Wrong or poor quality media type.

Solving Drive Key Problems

Solving DiskOnKey Problems

Problem Cause Solution

Troubleshooting Without Diagnostics

1. Try using a slower recording speed.

2. Verify that you are using the correct media for the drive.

3. Try a different brand of media. Quality varies widely between manufacturers.

Drive Key is not seen as a drive letter in Windows.

The computer boots to DOS after making a bootable Drive Key.

The drive letter after the last physical drive is not available.

Drive Key is bootable. Install the Drive Key after the

Solving Internet Access Problems

Problem Cause Solution

Unable to connect to the Internet.

Internet Service Provider (ISP) account is not set up properly.

Modem is not set up properly.

Web browser is not set up properly.

Change the default drive letter for the Drive Key in Windows XP.

operating system boots.

Verify Internet settings or contact the ISP for assistance.

Reconnect the modem. Verify the connections are correct using the quick setup documentation.

Verify that the Web browser is installed and set up to work with your ISP.

Service Reference Guide 489243-001 D–19

Cable/ DSL modem is not plugged in.

Plug in cable/DSL modem. You should see a “power” LED light on the front of the cable/DSL modem.

Troubleshooting Without Diagnostics

Solving Internet Access Problems (Continued)

Problem Cause Solution

Unable to connect to the Internet. (continued)

Cable/DSL service is not available or has been interrupted due to bad weather.

Try connecting to the Internet at a later time or contact your ISP. (If the cable/DSL service is connected, the “cable” LED light on the front of the cable/DSL modem will be on.)

Cannot automatically launch Internet programs.

The CAT5 10/100 cable is disconnected.

Connect the CAT5 10/100 cable between the cable modem and the computers’s RJ-45 connector. (If the connection is good, the “PC” LED light on the front of the cable/DSL modem will be on.)

IP address is not configured properly.

Contact the ISP for the correct IP address.

Cookies are corrupted. Windows XP

1. Select Start > Control Panel.

2. Double-click Internet Options.

3. On the General tab, click the Delete Cookies button.

You must log on to the ISP before some

Log on to the ISP and launch the desired program.

programs will start.

D–20 489243-001 Service Reference Guide

Solving Internet Access Problems (Continued)

Problem Cause Solution

Internet takes too long to download Web sites.

Modem is not set up properly.

Verify that the correct modem speed and COM port are selected.

For Windows XP

1. Select Start > Control Panel.

2. Double-click System.

3. Click the Hardware tab.

4. In the Device Manager area, click the Device Manager button.

5. Double-click Ports (COM & LPT).

6. Right-click the COM port your modem uses, then click Properties.

7. U n d e r Device status, verify

that the modem is working properly.

8. Under Device usage, verify

the modem is enabled.

9. If there are further problems,

click the Troubleshoot button and follow the on-screen instructions.

Troubleshooting Without Diagnostics

Service Reference Guide 489243-001 D–21

Troubleshooting Without Diagnostics

Diagnostic Front Panel LEDs and Audible Codes

Activity Beeps Possible Cause Recommended Action

Green Power LED On.

Green Power LED flashes every two seconds.

CPU Fan weak (RPM < 600) or not turning, Display Warning message and Long Beep for 5 sec and shut down.

System Fan weak (RPM < 600) or not turning, Display Warning message and Long Beep for 5 sec and shut down.

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

None Computer on. None

None Computer in

Suspend to RAM mode (some models only) or normal Suspend mode.

2 Processor thermal

protection activated:

A fan may be blocked or not turning.

OR The heatsink/fan

assembly is not properly attached to the processor.

2 Pre-video memory

error.

Not support wake up by mouse/ keyboard.

Should be Press Power button.

1. Ensure that the computer air vents

2. Open hood, press power button,

3. If fan is plugged in and seated

4. Reseat processor heatsink and

5. Contact an authorized reseller or

1. Reseat DIMMs. Power on the

2. Replace DIMMs one at a time to

3. Replace third-party memory with

4. Replace the system board.

are not blocked and the processor cooling fan is running.

and see if the processor fan spins. If the processor fan is not spinning, make sure the fan's cable is plugged onto the system board header. Ensure the fan is fully/properly seated or installed.

properly, but is not spinning, then replace processor fan.

verify that the fan assembly is properly attached.

service provider.

system.

isolate the faulty module.

HP memory.

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

D–22 489243-001 Service Reference Guide

3 Pre-video graphics

error.

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.

Troubleshooting Without Diagnostics

Diagnostic Front Panel LEDs and Audible Codes (Continued)

Activity Beeps Possible Cause Recommended Action

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

4 CPU configuration

error or invalid CPU detected before graphics card initialized.

1. Upgrade the BIOS to proper version.

2. Change the processor.

2 short beeps followed by a three second pause.

5 short beeps followed by a three second pause.

3 short beeps followed by three seconds pause.

2 short

beeps

5 short

beeps

3 short

beeps

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.

BIOS recovery

No action required.

was successful.

BIOS issue Upgrade the BIOS to proper version.

Service Reference Guide 489243-001 D–23

Troubleshooting Without Diagnostics

Diagnostic Front Panel LEDs and Audible Codes (Continued)

Activity Beeps Possible Cause Recommended Action

System does not power on and LEDs are not flashing.

None System unable to

power on.

Press and hold the power button for less than 4 seconds. If the hard drive LED turns green, then:

1. Check that the voltage selector, located on the rear of the power supply, is set to the appropriate voltage*. Proper voltage setting depends on your region.

2. Remove the expansion cards one at a time until the 5V_aux light on the system board turns on.

3. Replace the system board.

OR Press and hold the power button for

less than 4 seconds. If the hard drive LED does not turn green then:

1. Check that the unit is plugged into a working AC outlet.

2. Open hood and check that the power button harness is properly connected to the system board.

3. Check that both power supply cables are properly connected to the system board.

4. Check to see if the 5V_aux light on the system board is turned on. If it is turned on, then replace the power button harness.

5. If the 5V_aux light on the system board is not turned on, then replace the power supply.

6. Replace the system board.

4 short beeps followed by a three second pause.

D–24 489243-001 Service Reference Guide

4 short

beeps

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.

Restoring the Software

The Windows operating system and software can be restored to the original state that they were

when you purchased the computer by using the Restore Plus! CD. See the documentation included with the Restore Plus! CD for complete instructions on using this feature.

In the event that you lose power during the initial operating system installation process, use the

✎

Restore Plus! CD to install the operating system.

Troubleshooting Without Diagnostics

Service Reference Guide 489243-001 D–25

Troubleshooting Without Diagnostics

Contacting Customer Support

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

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 Worldwide Telephone Numbers Guide on the

✎

Library CD for technical assistance.

www.hp.com.

D–26 489243-001 Service Reference Guide

Memory

Computers equipped with Intel-based processors come with double data rate synchronous dynamic random access memory (DDR2) dual inline memory modules (DIMMs).

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

For proper system operation, the computer supports DDR2-SDRAM DIMMs. The DIMMs must be industry-standard 240-pin, unbuffered PC2 5300 667MHz or 6400 800MHz MHz-compliant,

1.8 volt DDR2-SDRAM DIMMs. The DDR2-SDRAM DIMMs must also:

■ support PC2 5300 667MHz or 6400 800MHz

■ contain the mandatory JEDEC SPD information

In addition, the computer supports:

■ 512Mbit, 1Gbit and 2Gbit 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

The system will not start if you install unsupported DIMMs.

✎

Service Reference Guide 489243-001 E–1

HP dx2358 MT, dx2355 MT Service & Reference Manual

Specifications and Main Features

Frequently Asked Questions

User Manual