Hp Compaq Dx2710 Mt Users Manual 483941 001

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service reference guide
HP Compaq dx2710 MT/dx2718 MT/dx2710 SFF
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 483941-001

Service Reference Guide
HP Compaq dx2710 MT/dx2718 MT/dx2710 SFF
Business PCs
1st Edition
Document Part Number: 483941-001

February 2008

© Copyright 2008 Hewlett-Packard Development Company, L.P.
The information contained herein is subject to change without notice.
Microsoft, MS-DOS, Windows, and Windows NT are trademarks of Microsoft Corporation in the U.S. and other
countries.
Intel is a trademark of Intel 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 dx2710 MT/dx2718 MT/dx2710 SFF Business PCs
First Edition (February 2008)
Document Part Number: 483941-001

Contents
1 Installing the Operating System
1.1
1.2

1.3

Microsoft Windows XP/Windows Vista/Redflag Linux . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1.1 Installing or Upgrading Device Drivers (Only applicable for Windows OS) . . . . . . . .
Converting to NTFS (Associated with Windows OS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.1 Windows XP Home/XP Professional(Vista downgrade)/
Vista Basic/Vista Business 32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HP Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–1
1–1
1–2
1–2
1–2

2 Setup Utilities and Diagnostics Features
2.1
2.2

2.3

Power-On Self-Test (POST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
Computer Setup Utilities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–2
2.2.1 Using Computer Setup (F10) Utilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–2
2.2.2 Computer Setup Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–4
Recovering the Configuration Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–11
2.3.1 Backing up the CMOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–11
2.3.2 Restoring the CMOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–11

3 Desktop Management
3.1
3.2

3.3

Initial Configuration and Deployment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ROM Flash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.1 FailSafe Boot Block ROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.2 Dual-State Power Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.3 Power Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.4 World Wide Web Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.1 Password Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.2 Establishing a Supervisor Password Using Computer Setup . . . . . . . . . . . . . . . . . . . . .
3.3.3 Establishing a User Password Using Computer Setup . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.4 Surge-Tolerant Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–1
3–1
3–1
3–2
3–2
3–3
3–3
3–3
3–3
3–3
3–6

4 Serial ATA Drive Guidelines and Features
4.1
4.2

4.3
4.4
4.5

SATA 3.0 Hard Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SATA Hard Drive Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.1 SATA Data Cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.2 SATA Power Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SATA SMART Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Drive Capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SATA BIOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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4–1
4–2
4–2
4–2
4–3
4–3
4–3

iii

Contents

5 Identifying the Chassis, Routine Care, and Disassembly Preparation
5.1
5.2

5.3

5.4

Chassis Designations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.1 Microtower (MT)/Small Form Factor (SFF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrostatic Discharge Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.1 Generating Static . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.2 Preventing Electrostatic Damage to Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.3 Personal Grounding Methods and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.4 Grounding the Work Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.5 Recommended Materials and Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Routine Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.1 General Cleaning Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.2 Cleaning the Computer Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.3 Cleaning the Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.4 Cleaning the Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.5 Cleaning the Mouse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4.1 Tools and Software Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4.2 Screws. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4.3 Cables and Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4.4 Hard Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4.5 Lithium Coin Cell Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5–1
5–1
5–3
5–3
5–3
5–4
5–4
5–4
5–5
5–5
5–5
5–6
5–6
5–6
5–7
5–7
5–7
5–8
5–8
5–8

6 Removal and Replacement Procedures — Microtower (MT)/
Small Form Factor (SFF) Chassis
6.1
6.2

6.3
6.4
6.5

6.6

6.7
6.8

Preparation for Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–1
Remove the computer access panel and front bezel (MT chassis and SFF chassis). . . . . . . . 6–2
6.2.1 Access Panel (MT Chassis) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–2
6.2.2 Front Bezel (MT Chassis) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–3
6.2.3 Removing the Computer Access Panel and Front Bezel (SFF chassis) . . . . . . . . . . . . 6–4
Using the Small Form Factor Computer in a Minitower Configuration. . . . . . . . . . . . . . . . . . 6–6
Front Drive Bezels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–7
6.4.1 Removing a 5.25" Drive Bezel Blank/MT Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–7
Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–8
6.5.1 Installing Memory Modules/MT chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–8
6.5.2 Installing DDR2-SDRAM DIMMs - SFF chassis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–9
Expansion Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–11
6.6.1 Expansion Slot Cover Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–11
6.6.2 PCI/PCIe Expansion Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–11
6.6.3 Installing an Expansion Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–13
6.6.4 Removing an Expansion Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–15
Cable Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–16
Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–17
6.8.1 Locating Drive Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–17
6.8.2 Removing a Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–18
6.8.3 Locating Drive Positions - SFF chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–21
6.8.4 Removing an Optical Drive or Diskette Drive - SFF chassis. . . . . . . . . . . . . . . . . . . . 6–22
6.8.5 Installing an Optional Optical Drive - SFF chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–23
6.8.6 Upgrading the Hard Drive - SFF chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–26

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Contents

6.9
6.10
6.11
6.12
6.13
6.14

Front I/O Panel Housing Assembly - MT chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heatsink - MT chassis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.14.1 Battery Holder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.15 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6–28
6–29
6–30
6–31
6–33
6–34
6–35
6–36

A Connector Pin Assignments
B Power Cord Set Requirements
C POST Error Messages
D Troubleshooting Without Diagnostics
E Memory

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483941-001

1
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. During this process,
do not turn off your computer unless you are directed to do so.

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

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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

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Service Reference Guide

2
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

Supervisor Password is set, a key icon appears on the screen while POST is running. You
✎ Ifwilltheneed
to enter the password before continuing. Refer to Chapter 3, Section 3.1, “Initial

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.”

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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 Enter to bypass the title screen, if necessary.
you do not press the F10 key at the appropriate time, you must turn the computer off, then on
✎ Ifagain,
and press the F10 key again to access the utility.
If you are using a PS/2 keyboard, you may see a Keyboard Error message—disregard it.

2–2

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Setup Utilities and Diagnostics Features

3. A choice of headings appears in the Computer Setup Utilities menu: System Information,
Standard CMOS Features, Advanced BIOS Features, Advanced Chipset Features, Integrated
Peripherals, Power Management Setup, PnP/PCI Configurations, Hardware Monitor Setup,
Load Defaults Setting, Set Supervisor Password, Set User Password, Save Setting and Exit,
and Exit Without Saving.
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 Enter. To return to the Computer Setup
Utilities menu, press Esc.
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.

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2–3

Setup Utilities and Diagnostics Features

2.2.2 Computer Setup Menu
Computer Setup
Heading

Option

Description

System
Information

System S/N

(view only)

Product Name

(view only)

OwnerShip TAG
[Press Enter]

Enter ownership tag assigned by the owner.

OwnerShip TAG

(view only)

BIOS Version

(view only)

BIOS Release Date

(view only)

System Chipset Type

(view only)

Processor Type

(view only)

Processor Speed

(view only)

CPU ID

(view only)

Cache Size

(view only)

Memory DIMM1

(view only)

Memory DIMM2

(view only)

Memory DIMM3

(view only)

Memory DIMM4

(view only)

DDR2 Memory Size

(view only)

UUID

(view only)

Chassis Serial Number
[Press Enter]

When user enter to setup with advanced
mode (Ctrl+A)

Chassis Serial Number

(view only)

Asset TAG Number
[Press Enter]

Enter asset tag assigned by the company.

Asset TAG Number

(view only)

Integrated MAC

(view only)

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.

Standard
CMOS
Features

✎

2–4

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

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Computer Setup (Continued)
Heading

Option

Description

Standard
CMOS
Features

SATA Port 0

For each, allows you to:

(continued)

SATA Port 1

• IDE Channel 0 Master (for SATA Port 0 Only)

SATA Port 2

• IDE Channel 1 Slave (for SATA Port 1 Only)

SATA Port 3

• detect HDD size and head on selected
channel
• set extended drive on selected channel to (for
SATA Port 2 and port 3 only):
• None
• Auto
• set access mode on selected channel to:
•
•
•
•

CHS
LBA
Large
Auto

• view:
•
•
•
•
•
•

Capacity
Cylinder
Head
Precomp
Landing Zone
Sector

Legacy Mode Support
(for SATA 0/1 ONLY)

Disable

Halt On

Allows you to set at:

Enable
• All Errors
• No Errors
• All but Keyboard
• All but Diskette
• All but Disk/Key

Advanced
BIOS Features

F11 Prompt

Allow you to enable or disable this feature.

Quick Power On Self Test

Disables/enables the system to skip certain
tests while booting.
Enabling this feature decreases the time
required to boot the system.

POST Delay Time (seconds)

Allows you to set a POST delay time to:
• 0 Sec
• 5 Sec
• 10 Sec
• 15 Sec
• 20 Sec

✎

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

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Computer Setup (Continued)
Heading

Option

Description

Advanced
BIOS Features

Removeable Device Priority

Allow you to select FDD or USB-FDD as the
first removeable device.

(continued)

Hard Disk Boot Priority

Allows you to specify the order of attached
hard drive devices (such as USB HDD
storage, USB2 Drive Key, or USB flash
media, IDE HDD, SATA HDD or bootable
add-in cards). The first drive in the order has
priority in the boot sequence and is
recognized as drive C (if any devices are
attached).

CD-ROM Boot Priority

Allows you to specify the order of attached
optical drive device.

Network Boot Priority

Allows you to specify the order of network
device.

First Boot Device

Allows you to specify which devices will boot
first, second, and third, or to disable any of
the three:

Second Boot Device
Third Boot Device

• Removable

Fourth Boot Device

• Hard Disk
• CD-ROM
• Network
• Disabled

✎

MS-DOS drive lettering assignments
may not apply after a non-MS-DOS
operating system has started.

Boot Other Device

Disables/enables boot other device.

Load Boot Menu Selectable

Disables/enables boot menu selectable

APIC Mode

Disables/enables the APIC mode.
Modifiable when Hyper-Threading
Technology is DISABLED.

Hyper-Threading Technology

Disable/ enables Hyper-Threading
technology. This item will show when the
CPU supports Hyper-Threading technology.

System Keyboard

Allows you to set system keyboard to absent
or present.

Boot Up NumLock Status

Allows you to set the default NumLock status
to off or on.

Security Option

✎
2–6

Allows you to set the security option to Setup
or System so that the password is required
every time the system boots or only when
entering Computer Setup.

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

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Computer Setup (Continued)
Heading

Option

Description

Advanced
Chipset
Features

PEG/Onchip VGA Control

Allows you to set system display at:

(VGA Setting)

• Onchip VGA
• PEG Port
• Auto

On-Chip Frame Buffer Size
(VGA Setting

Allow you to set On-Chip Frame Buffer Size
to. Modifiable when PEG/Onchip VGA
Control is Onchip VGA or Auto:
• 1MB
• 8MB

DVMT Mode

Allows you to set DVMT Mode to:

(VGA Setting)

• Fixed
• DVMT

DVMT/FIXED Memory Size
(VGA Setting)

Allows you to set memory size to. Modifiable
when PEG/Onchip VGA Control is Onchip
VGA or Auto:
• 128MB
• 256MB
• MAX.

Disable MCHBAR MMIO

Disable/ enable this feature

Init Display First

Allows you to set system display priority:

(VGA Setting)

• PCI Slot
• Onboard

✎

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

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Setup Utilities and Diagnostics Features

Computer Setup (Continued)
Heading

Option

Description

Integrated
Peripherals

USB Controller

Disables/enables USB controller.

USB Legacy Support

Disables/enables USB legacy support.

HD Audio

Allows you to auto-detect or disable onboard
audio.

Onboard LAN

Disables/enables onboard LAN controller.

Onboard LAN Boot ROM

Disables/enables the boot ROM of the
onboard LAN chip.

Onboard FDC Controller

Disables/enables onboard FDC controller.

Serial Port 1/2

Allows you to select a setting for the onboard
serial port:
• Disabled
• 3F8/IRQ4
• 2F8/IRQ3
• 3E8/IRQ4
• 2E8/IRQ3
• Auto

Parallel port

Allows you to select a setting for the onboard
parallel port:
• Disabled
• 378/IRQ7
• 278/IRQ5
• 3BC/IRQ7

Parallel Port Mode

Allows you to select parallel port mode:
• Standard
• EPP1.9+SPP
• ECP
• EPP1.9+ECP
• Printer
• EPP1.7+SPP

ECP Mode Use DMA

✎

2–8

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.

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Computer Setup (Continued)
Heading

Option

Description

Power
Management
Setup

HPET Support

Disable/ enable HPET feature, only can be
visible for Vista OS.

HPET Mode

32 bit mode/64 bit mode. View only, and
only can be visible for Vista OS.

WDRT Support

Disable/ enable WDRT feature, only can be
visible for Vista OS.

WDRT Run/Stop

Run/Stop. View only, and only can be visible
for Vista OS.

WDRT Count

1023. View only, and only can be visible for
Vista OS.

ACPI Function

Enables/disables ACPI functions. Changing
this item can make the existing OS unusable.

ACPI Suspend Type

Allows you to set type of ACPI suspend to:
• S1 (POS)
• S3 (STR)

Restore On AC/Power Loss

Allows you to select system power loss
behavior:
• On
• Off
• Last State

PnP/PCI
Configurations

✎

PCI-E Wake on PME

Disable/ enable PCI-E wake up function

Resume On PME

Disables/enables Resume by PME.

Wake On Ring

Disables/enables Resume on Ring.

Resume On Alarm

Disables/enables RTC alarm.

Date (of Month) Alarm

If Resume by Alarm is enabled, allows you to
select the day of the month for resumption of
RTC alarm.

Time (hh:mm:ss) Alarm

If Resume by Alarm is enabled, allows you to
select what time the RTC alarm will resume.

Reset Configuration Data

Disables/enables automatic reconfiguration.
The default is Disabled. Select Enabled to
reset Extended System Configuration Data
(ESCD) when you exit Setup, if you have
installed a new add-on and the system
reconfiguration has caused such a serious
conflict that the OS cannot boot.

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

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Setup Utilities and Diagnostics Features

Computer Setup (Continued)
Heading

Option

Description

PnP/PCI
Configurations

Resources Controlled By

Allows you to select whether resources are
controlled automatically or manually:

(continued)

• Auto (ESCD–Extended Storage Configuration
Data)
• Manual

BIOS can automatically configure all the
bootable and Plug-and-Play-compatible
devices. If you choose Auto, you cannot
select IRQ, DMA and memory base address
fields since BIOS automatically assigns them.
IRQ Resources
• IRQ-3 assigned to
• IRQ-4 assigned to
• IRQ-5 assigned to
• IRQ-7 assigned to
• IRQ-9 assigned to
• IRQ-10 assigned to
• IRQ-11assigned to

When resources are controlled manually,
allows you to assign each system interrupt a
type, depending on the type of device using
the interrupt.
Legacy ISA for devices compliant with the
original PC AT bus specification, PCI/ISA
PnP for devices compliant with the Plug-andPlay standard whether designed for PCI or
ISA bus architecture.

• IRQ-12 assigned to
• IRQ-14 assigned to
• IRQ-15 assigned to

Hardware
Monitor Setup

(view only)

System Fan Speed

(view only)

CPU Fan Fault Detect

Disables/enables detection of CPU failure
during POST.

SYS Fan Fault Detect

Disables/enables detection of Fan failure
during POST.

Load Defaults
Setting

Allows you to reset Computer Setup to
factory defaults.

Set Supervisor
Password

Allows you to establish a password to control
access to Computer Setup.

Set User
Password

Allows you to establish a password to control
access to the computer.

Save Setting
and Exit

Allows you to save current settings and exit
Computer Setup.

Exit Without
Saving

Allows you to exit Computer Setup without
saving changes.

✎

2–10

CPU Fan Speed

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

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

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3
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:

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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.
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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 http://www.hp.com/support. The Web site contains
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.
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 Enter to bypass the title screen, if necessary.
you do not press the F10 key at the appropriate time, you must turn the computer off, then on
✎ Ifagain,
and press the F10 key again to access the utility.
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 Setup.

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.
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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 Enter to bypass the title screen, if necessary.
you do not press the F10 key at the appropriate time, you must turn the computer off, then on
✎ Ifagain,
and press the F10 key again to access the utility.
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 Setup.

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.
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 Enter to bypass the title screen, if necessary.
you do not press the F10 key at the appropriate time, you must turn the computer off, then on
✎ Ifagain,
and press the F10 key again to access the utility.
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.

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.

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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.
you do not press the F10 key at the appropriate time, you must turn the computer off, then on
✎ Ifagain,
and press the F10 key again to access the utility.
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.
4. Press the Enter key.
The new password takes effect the next time you turn on the computer.
to the “National Keyboard Delimiter Characters” section in this chapter for information
✎ Refer
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.
you do not press the F10 key at the appropriate time, you must turn the computer off, then on
✎ Ifagain,
and press the F10 key again to access the utility.
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.
to “National Keyboard Delimiter Characters” for information about the alternate delimiter
✎ Refer
characters. The power-on password and setup password may also be changed using the Security
options in Computer Setup.

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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.
National Keyboard Delimiter Characters
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

Polish

U.K. English

German

Portuguese

U.S. English

* For Bosnia-Herzegovina, Croatia, Slovenia, and Yugoslavia

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 CMOS jumper E17 (clear: 2-3 normal: 1-2). 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.

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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

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

attaching the SATA cable to the system board always connect the primary hard drive to
✎ When
SATA 0.

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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

Ground

P2*

A+

Transmit data

Receive data

P3*

A-

Transmit data

Receive data

Ground

P5**

B-

Receive data

Transmit data

P6**

B+

Receive data

Transmit data

Ground

*P2 and P3 differential signal pair
**P5 and P6 differential signal pair

4.2.2 SATA Power Cable

4–2

Usage

Notes

Usage

Notes

V3.3

3.3 V power

5 V power

V3.3

3.3 V power

P10

Ground

V3.3

3.3 V power

P11

Ground

P12

Ground

P13

V 12

12 V power

Ground

P14

V12

12 V power

5 V power

P15

V12

12 V power

5 V power

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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.
Drive/Partition Capacity Limits
Maximum Size
File
System

Controller
Type

Operating System

Partition

Drive

FAT 32

ATA

Windows 2000/XP/Vista

32 GB

128 PB

NTFS

ATA

Windows NT/2000/XP/Vista

2 TB

128 PB

4.5 SATA BIOS
Windows 2000, XP, Vista, and Linux
• 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

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5
Identifying the Chassis, Routine Care, and
Disassembly Preparation
This chapter provides general service information for the computer. Adherence to the procedures
and precautions described in this chapter is essential for proper service.

Ä
5.1

CAUTION: When the computer is plugged into an AC power source voltage is always applied to the
system board. You must disconnect the power cord from the power source before opening the computer
to prevent system board or component damage.

Chassis Designations

5.1.1 Microtower (MT)/Small Form Factor (SFF)

dx2710 MT

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dx2718 MT

dx2710SFF
Note: dx2718 MT is only for China Market.

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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

7,500 V
3,000 V
400 V

15,000 V
5,000 V
800 V

35,000 V
12,000 V
6,000 V

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

7,000 V
5,000 V

20,000 V
11,000 V

26,500 V
21,000 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.

■

Avoid contact with pins, leads, or circuitry.

■

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

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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

1,500
7,500
15,000

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.

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

5–4

■

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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5.3

■

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

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.

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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.

5–6

■

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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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.
screws have a black finish.
✎ Metric
U.S. (Unified Standard) screws have a silver finish and are only used on hard drives.
each subassembly is removed from the computer, it should be placed away from the work
✎ As
area to prevent damage.

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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 Section 5.2, “Electrostatic Discharge Information.”

■

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.

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.

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6
Removal and Replacement Procedures—
Microtower (MT)/Small Form Factor (SFF)
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.

Ä
Ä

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.
disassembly, label each cable as you remove it, noting its position and routing. Keep all
✎ During
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.

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6.2 Remove the computer access panel and front bezel
(MT chassis and SFF 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.

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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.

*
* 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.

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6.2.3 Removing the Computer Access Panel and Front Bezel
(SFF chassis)
To remove the computer access panel:
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 the computer, and disconnect any
external devices.

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.

the computer on its side (with the computer access panel facing up) before removing the
✎ Lay
computer access panel and installing hardware.

3. Loosen the screw on the rear of the computer 1, slide the access panel toward the rear of the
computer 2, then lift it off.
Removing the Computer Access Panel

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4. To remove the front bezel, gently pull up all three tabs 1 on the top of the bezel, then pull the
bezel 2 away from the chassis.

Removing the Front Bezel

To reassemble the computer, reverse the above procedure.
down while replacing the access panel. Refer to the label on the inside of the access panel
✎ Press
for more information.
re-install the front bezel, insert the two bezel bottom tabs, then rotate the front bezel forward
✎ Toto snap
the three tabs on the top of the bezel in place.

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6.3 Using the Small Form Factor Computer in a
Minitower Configuration
The Small Form Factor computer can be used in either a minitower or desktop configuration. To
use it in the minitower configuration, you must purchase a tower stand from HP (part number
316593-001).

CAUTION: If the computer is in the desktop configuration, ensure at least 4 inches (10.2 cm) of space
on all sides of the computer remains clear and free of obstructions.

To install the tower stand:
1. Rotate the computer into the tower position 1 and align the hole at the base of the computer
with the post and thumbscrew in the stand 2.
2. Tighten the screw to secure the computer to the stand 3. This adds stability and helps to
ensure proper airflow to the internal components.

Installing the Tower Stand

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6.4 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)”).
3. Remove the access panel and the front bezel -SFF (Section 6.2.3, “Removing the Computer
Access Panel and Front Bezel (SFF chassis)”) .

6.4.1 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 and SFF 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

a bezel blank, slide the left side of the blank into the two retainer slots on
✎ Totheinstall
left side of the front bezel then snap the right side of the blank into place.

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

6.5.1 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.

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

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module can be installed in only one way. Match the notch on the module with the tab
✎ Aonmemory
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.

6.5.2 Installing DDR2-SDRAM DIMMs - SFF chassis

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

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 and front bezel.

CAUTION: Check the position of all cables and wires before raising or lowering the Easy Access drive
bay to prevent damage.

4. Rotate the Easy Access drive bay to an upright position.

Rotating the Easy Access Drive Bay

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5. Locate the memory module sockets.

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

6. Open both latches of the memory module socket 1, then insert the memory module into the
socket 2.

Installing a DIMM

module can be installed in only one way. Match the notch on the module with the tab
✎ Aonmemory
the memory socket.
you have one preinstalled DIMM in socket XMM1 and are adding a second DIMM, it is
✎ Ifrecommended
that you install an identical DIMM into the XMM2 socket. If you are populating
all four DIMM sockets, use identical DIMMs in each socket. Otherwise, the computer will not
operate in dual channel mode. For maximum performance, populate the sockets so that the
memory capacity of Channel A is equal to the memory capacity of Channel B. For example, if
you have one preinstalled DIMM in socket XMM1 and are adding a second DIMM, it is
recommended that you will install a DIMM of equal memory capacity into the XMM3 or
XMM4 socket.
7. 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.

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6.6 Expansion Cards
6.6.1 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 and SFF 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.

6.6.2 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 and SFF chassis)”).
3. Lay the computer down on its side to make it easier to work on.
4. Remove the slot cover lock (Section 6.6.1, “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.
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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 1, slide the expansion card into the expansion socket and press it firmly into
place 2.

you install an expansion card, make sure you press firmly on the card so that the entire
✎ When
connector seats properly in the expansion card socket.
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.

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6.6.3 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

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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.

6–14

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.)

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6.6.4 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.

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6.7 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.

6–16

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.

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6.8 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.

6.8.1 Locating Drive Positions

*
* These apply for selected models and countries only.
Drive Positions

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Drive Positions
Item

Description

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

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

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.

6.8.2 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.
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

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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

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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

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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.

6.8.3 Locating Drive Positions - SFF chassis

Desktop Drive Positions

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1 3.5-inch drive bay (1.44-MB diskette drive shown)*
2 5.25-inch drive bay for optional drives
3 3.5-inch, internal, standard hard drive bay
*If the computer has a 1.44-MB diskette drive installed, it will be
configured with a diskette drive bezel as shown in the illustration. If
the computer contains an empty 3.5-inch drive bay, then a bezel
blank will be installed on the computer instead. If you do not have a
drive in this slot, you may choose to install a 3.5-inch device (such as
a diskette drive, hard drive, or Zip drive) later on. However, to install
a 3.5-inch device other than a diskette drive or hard drive, you must
order the 3.5-inch device bezel.

To verify the type, size, and capacity of the storage devices installed in the computer, run
Computer Setup. Refer to the Computer Setup (F10) Utility Guide for more information.

6.8.4 Removing an Optical Drive or Diskette Drive - SFF chassis

CAUTION: All removable media should be taken out of the drives before removing the drive from the
computer.

✎ An optical drive is a CD-ROM, CD-RW, or DVD-ROM drive.
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 and front bezel.
4. Raise the Easy Access drive bay to the upright position.
5. Disconnect the audio, signal, and drive power cables. The other end of the audio cable should
remain connected to the audio connector on the system board.

✎ Only Linux systems will have an audio cable connected to the optical drive.
6. Return the Easy Access drive bay to the up position.

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Removing the Optical Drive or Diskette Drive

To replace the drive, reverse the removal procedures.
replacing the drive, transfer the four screws from the old drive to the new one. The screws
✎ When
take the place of drive rails.

6.8.5 Installing an Optional Optical Drive - SFF chassis
To install an optional optical drive:
1. Remove the optical drive if present.
2. Install the guide screws as indicated.

CAUTION: Use only 3/16-inch or 5-mm long screws as guide screws. Longer screws can damage the
internal components of the drive.

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Removal and Replacement Procedures— Microtower (MT)/Small Form Factor (SFF) Chassis

Installing Guide Screws in the Optical Drive

3. Position the guide screws on the drive into the J-slots in the drive bay 1. Then, slide the drive
toward the rear of the computer 2.

Installing the Optical Drive

✎ The drive release latch automatically locks in place when installing a drive.

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4. Raise the Easy Access drive bay to the upright position and connect the flat ribbon cable and
audio cable to the system board.

Connecting the Flat Ribbon Cable and Audio Cable

5. Connect the power cable, flat ribbon cable, and audio cable to the rear of the optical drive.

✎ Only Linux systems require an audio cable to be connected to the optical drive.
6. Return the Easy Access drive bay to the down position. Be sure not to pinch the cables in the
chassis when lowering the Easy Access drive bay.
7. Replace the front bezel and computer access panel.
The system automatically recognizes the drive and reconfigures the computer.

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

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Removal and Replacement Procedures— Microtower (MT)/Small Form Factor (SFF) Chassis

6.8.6 Upgrading the Hard Drive - SFF chassis
Removing and Replacing the Hard Drive
a serial advanced technology attachment (SATA) hard drive can be installed on this
✎ Only
computer.
sure to back up the data on the old hard drive before removing it so that you can install the
✎ Make
data onto the new hard drive.
The preinstalled 3.5-inch hard drive is located on the right side of the computer. To remove and
replace the hard drive:
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 and front bezel.
4. Raise the Easy Access drive bay to the upright position.
5. Disconnect the power cable and data cable from the back of the drive.

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6. Press the latch 1.
7. Slide the drive to the right of the bay 2.

Removing the Hard Drive

8. To install a hard drive, reverse the above procedure.
9. Connect the power cable 1 and data cable 2 to the hard drive.

Connecting the Power Cable and Data Cable

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Removal and Replacement Procedures— Microtower (MT)/Small Form Factor (SFF) Chassis

6.9 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 (Section 6.1, “Preparation for Disassembly”).
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.

1
2

To install the housing assembly, reverse the removal procedures.
The installtion method for SFF is similar to MT.

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Removal and Replacement Procedures— Microtower (MT)/Small Form Factor (SFF) Chassis

6.10 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 and SFF 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.

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Removal and Replacement Procedures— Microtower (MT)/Small Form Factor (SFF) Chassis

6.11 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 and SFF 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.

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6.12 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 and SFF chassis)”).
3. Disconnect the heatsink control cable from the system board and remove the heatsink.
Section 6.11, “Heatsink - MT chassis”
4. Rotate the processor locking lever to its full open position 1.
5. Raise and rotate the microprocessor retainer to its fully open position 2.
6. Carefully lift the processor from the socket 3.

CAUTION: Do NOT handle the pins in the processor socket. These pins are very fragile and handling
them could cause irreparable damage. Once pins are damaged it may be necessary to replace the
system board.

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.
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Removal and Replacement Procedures— Microtower (MT)/Small Form Factor (SFF) Chassis

5. Go to step 7.
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.

installing a new processor onto the system board, always update the system ROM to ensure
✎ After
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.

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6.13 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 and SFF 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 6.11, “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.
The difference of mounting PCA into chassis between MT and SFF is minor, refer to different
shape chassis.

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Removal and Replacement Procedures— Microtower (MT)/Small Form Factor (SFF) Chassis

6.14 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.
lifetime of the lithium battery can be extended by plugging the computer into a live AC wall
✎ The
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:

■
■
■
■

Ä
N
Ä

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.

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 and SFF 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.

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6.14.1 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.

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Removal and Replacement Procedures— Microtower (MT)/Small Form Factor (SFF) Chassis

6.15 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 and SFF 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.

To install the power supply, reverse the removal procedure.
The installtion of power supply for MT and SFF is same.

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A
Connector Pin Assignments
This appendix contains the pin assignments for many computer and workstation connectors.
Some of these connectors may not be used on the product being serviced.
Enhanced Keyboard
Connector and Icon

Signal

1
2
3

Data
Unused
Ground

4
5
6

+5 VDC
Clock
Unused

Signal

1
2
3

Data
Unused
Ground

4
5
6

+5 VDC
Clock
Unused

Signal

1
2
3
4

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

5
6
7
8

Unused
(-) Receive Data
Unused
Unused

Mouse
Connector and Icon

Ethernet RJ-45
Connector and Icon

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Connector Pin Assignments

Parallel Interface
Connector and Icon

Signal

1
2
3

Strobe
Data Bit 0
Data Bit 1

7
8
9

Data Bit 5
Data Bit 6
Data Bit 7

13
14
15

Select
Auto Linefeed
Error

4
5
6

Data Bit 2
Data Bit 3
Data Bit 4

10
11
12

Acknowledge
Busy
Paper End

16
17
18-25

Initialize Printer
Select IN
Signal Ground

Serial Interface, Powered and Non-Powered
Connector and Icon

Signal

1
2
3

Carrier Detect (12V if powered)
Receive Data
Transmit Data

4
5
6

Data Terminal Ready
Signal Ground
Data Set Ready

7
8
9

Request to Send
Clear to Send
Ring Indicator (5V if powered)

Signal

1
2
3
4

+5 VDC
- Data
+ Data
Ground

Signal

1 (Tip)

Audio

2 (Ring)

Power

3 (Shield)

Ground

USB
Connector and Icon

Microphone
Connector and Icon (1/8" miniphone)
1 2 3

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Connector Pin Assignments

Headphone
Connector and Icon (1/8" miniphone)
1 2 3

Signal

1 (Tip)

Audio_Left

2 (Ring)

Audio_Right

3 (Shield)

Ground

Signal

1 (Tip)

Audio_In_Left

2 (Ring)

Audio_In_Right

3 (Shield)

Ground

Signal

1 (Tip)

Audio_Out_Left

2 (Ring)

Audio_Out_Right

3 (Shield)

Ground

Line-In Audio
Connector and Icon (1/8" miniphone)
1 2 3

Line-Out Audio
Connector and Icon (1/8" miniphone)
1 2 3

Monitor
Connector and Icon

Signal

1
2
3

Red Analog
Green Analog
Blue Analog

6
7
8

Ground
Ground
Ground

11
12
13

Not used
DDC Serial Data
Horizontal Sync

4
5

Not used
Ground

9
10

+5V DC (fused)
Ground

14
15

Vertical Sync
DDC Serial Clock

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Connector Pin Assignments

24-Pin Power
Connector
24

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

A–4

Signal

GND

+12 V

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B
Power Cord Set Requirements
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.
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.

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C
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

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

Replace the BIOS

CMOS battery failed

The CMOS battery is no
longer functional.

Replacement battery.

CMOS checksum error Defaults loaded

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.

Check the battery and replace if
necessary.

CPU at xxxx

Displays the running
speed of the CPU.

Not an error, no action request

Press ESC to skip
memory test

A remind message, not
an error.

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

HARD DISK INSTALL
FAILURE

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

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.

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POST Error Messages

POST Error Messages
Screen Message

Recommended Action

Keyboard error or no
keyboard present

Cannot initialize the
keyboard.

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.

Memory Test:

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

No action request

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.

Reseat memory modules.

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.

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

Override enabled Defaults loaded

C–2

Probable Cause

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Replace memory modules.

Service Reference Guide

POST Error Messages

POST Error Messages
Screen Message
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.

Probable Cause
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.

Recommended Action
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.
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.

Service Reference Guide

483941-001

C–3

D
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 AGP 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

483941-001

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
Computer will not
turn on.

Cause

Solution

Cables to the external
power source are
unplugged.

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

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

Select the proper AC voltage using the
slide switch.

A defective PCI card has
been installed.

Remove any expansion board that
was just installed.

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

Reseat drive data and power supply
cables.

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

1. Unit is in an exceedingly hot
environment. Let it cool down.
2. Ensure that computer air vents are
not blocked and the internal fan is
running.
3. Contact an HP authorized reseller
or service provider.

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

Software control of the
power switch is not
functional.

1. Press and hold the power button
for at least four seconds until the
computer turns off.

Computer will not
respond to USB
keyboard or mouse.

Computer is in
standby mode.

Press the power button to resume from
standby mode.

Keyboard or mouse is not
connected to computer.

Connect keyboard and mouse cables
to computer.

System has locked up.

Restart the computer.

2. Disconnect the power cord from
the electrical outlet.

When attempting to resume from standby mode, do not hold down the
Ä CAUTION:
power button for more than four seconds. Otherwise, the computer will shut down and
you will lose any unsaved data.

D–2

483941-001

Service Reference Guide

Troubleshooting Without Diagnostics

Problem
Computer date and time
display is incorrect.

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

✎

MConnecting the
computer to a live
AC outlet prolongs
the life of the
RTC battery.

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

The Num Lock key
may be on.

Poor performance is
experienced.

Processor is hot.

Solution
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.
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. 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
Hard drive is full.
experienced (continued).

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
accessed did not release
reserved memory back to
the system.

Restart the computer.

Virus resident on the hard
drive.

Run the virus protection program.

Too many applications
running.

1. Close unnecessary applications to
free up memory.
2. Add more memory.

Service Reference Guide

483941-001

D–3

Troubleshooting Without Diagnostics

Problem

Cause

Solution

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

1. Lower the display resolution for the
current application or consult the
documentation that came with the
application for suggestions on
how to improve performance by
adjusting parameters in the
application.
2. Add more memory.
3. Upgrade the graphics solution.

Blank screen (no video).

Blank screen (no video)
(continued).

Cause unknown.

Restart the computer.

Monitor is not turned on
and the monitor light is
not on.

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

The cable connections are
not correct.

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

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

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

Computer is in standby
mode.

Press the power button to resume from
standby mode.

When attempting to resume from standby mode, do not hold down the
Ä CAUTION:
power button for more than four seconds. Otherwise, the computer will shut down and
you will lose any unsaved data.

Power LED is flashing
and computer will not
start.

D–4

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

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

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

Set the selector switch to agree with
the cable connection.

Bad monitor.

Try a different monitor.

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

Refer to “Interpreting Diagnostic Lights
and Audible Codes” to interpret the
error code.

483941-001

Service Reference Guide

Troubleshooting Without Diagnostics

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

Computer will not start.

Cause

Solution

Device is not seated or
connected properly.

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

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

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

Power switch of new
external device is not
turned on.

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

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

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

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

Use Windows 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.

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

1. Review the documentation that
came with the system to
determine if you are using the
correct memory modules and to
verify the proper installation.
2. Observe the beeps and LED
lights on the front of the
computer. See “Interpreting
Diagnostic Lights and Audible
Codes” to determine possible
causes.
3. If you still cannot resolve the
issue, contact Customer Support.

Service Reference Guide

483941-001

D–5

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.
you see flashing LEDs on a PS/2 keyboard, look for flashing LEDs on the front panel of the
✎ Ifcomputer
and refer to the following table to determine the front panel LED codes.
actions in the following table are listed in the order in which they should be
✎ Recommended
performed.

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

D–6

483941-001

Service Reference Guide

Troubleshooting Without Diagnostics

Solving Display Problems
Solving Display Problems
Problem

Cause

Solution

Blank screen (no video).

The cable connections
are not correct.

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

Screen blanking utility
installed or energy
saver features enabled.

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

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

Reflash the ROM using a ROMPaq
diskette.

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

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

Computer is in
standby mode.

Press the power button to resume
from standby mode.

When attempting to resume from standby mode, do not hold down the
Ä CAUTION:
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.

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.

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.

Service Reference Guide

483941-001

D–7

Troubleshooting Without Diagnostics

Solving Display Problems (Continued)
Problem

Cause

Solution

Power LED flashes Red six
times, once every second,
followed by a two second
pause, and the computer
beeps six times.

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.

Disable monitor energy saver
feature.

Dim characters.

The brightness and
contrast controls are not
set properly.

Adjust the monitor brightness and
contrast controls.

Cables are not properly
connected.

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

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

Install the video drivers included in
the upgrade kit.

Monitor is not capable
of displaying requested
resolution.

Change requested resolution.

Blurry video or requested
resolution cannot be set.

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

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

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.

D–8

Monitor needs to be
degaussed.

Degauss the monitor.

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

Monitor degaussing coil
has been activated.

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

Clicking noise coming from
inside a CRT monitor.

Electronic relays have
been activated inside
the monitor.

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.

483941-001

Service Reference Guide

Troubleshooting Without Diagnostics

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.

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)

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

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

Certain typed symbols do
not appear correct.

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

Service Reference Guide

2. Manually synchronize the Clock
and Clock Phase on-screen
display functions.
NOTE: Use the monitor model
number when searching for the
SoftPaq.

483941-001

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.

D–9

Troubleshooting Without Diagnostics

Solving Audio Problems
Solving Audio Problems
Problem

Cause

Solution

Sound does not come
out of the speaker or
headphones.

Software volume control
is turned down.

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

The external speakers
are not turned on.

Turn on the external speakers.

External speakers
plugged into the wrong
audio jack.

See the sound card documentation
for proper speaker connection.

Audio cable not
connected.

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

Digital CD audio is not
enabled.

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.

Turn on and use headphones or
external speakers, if connected, or
disconnect headphones or external
speakers.
1. From the Control Panel
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.

Computer is in
standby mode.

Press the power button to resume
from standby mode.

When attempting to resume from standby mode, do not hold down the
Ä CAUTION:
power button for more than four seconds. Otherwise, the computer will shut down and
you will lose your data.

D–10

483941-001

Service Reference Guide

Troubleshooting Without Diagnostics

Solving Audio Problems (Continued)
Problem

Cause

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

Solution
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.

✎

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.

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

483941-001

D–11

Troubleshooting Without Diagnostics

Solving Printer Problems
Solving Printer Problems
Problem

Cause

Solution

Printer will not print.

Printer is not turned on
and online.

Turn the printer on and make sure it
is online.

The correct printer
driver for the
application are not
installed.

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.

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

Make the proper network
connections to the printer.

Printer may have failed.

Run printer self-test.

Printer will not turn on.

The cables may not be
connected properly.

Reconnect all cables.

Printer prints garbled
information.

The correct printer
driver is not installed.

Install the correct printer driver for
the application.

The cables may not be
connected properly.

Reconnect all cables.

Printer memory may be
overloaded.

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

The printer may be out
of paper.

1. Check the paper tray and refill it
if it is empty.

Printer is offline.

2. Select online.

D–12

483941-001

Service Reference Guide

Troubleshooting Without Diagnostics

Solving Keyboard and Mouse Problems
Solving Keyboard Problems
Problem

Cause

Keyboard commands and
typing are not recognized
by the computer.

Keyboard connector
is not properly
connected.

Solution
1. Turn off the computer.
2. Reconnect the keyboard to the
back of the computer and
restart the computer.

Program in use has
stopped responding
to commands.

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

Keyboard needs
repairs.

Replace the keyboard.

Computer is in
standby mode.

Press the power button to resume
from standby mode.

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.

Mouse does not respond to
movement or is too slow.

Mouse connector is
not properly plugged
into the back of the
computer.

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.

Program in use has
stopped responding
to commands.

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

Mouse needs repairs.

Replace the mouse.

Computer is in
standby mode.

Press the power button to resume
from standby mode.

Service Reference Guide

Mouse roller ball is
dirty.

483941-001

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

D–13

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.

Wake-on-LAN is not
enabled.

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

Network driver does
not detect network
controller.

Network controller is
disabled.

Run Computer Setup and enable
network controller.

Incorrect network driver.

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

No active network is
detected.

Check cabling and network
equipment for proper connection.

Network controller is not
set up properly.

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

Network driver is not
properly loaded.

Reinstall network drivers.

System cannot autosense
the network.

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

The cable is not securely
connected.

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

The cable is attached to
the incorrect connector.

Ensure that the cable is attached to
the correct connector.

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

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

Network controller
interrupt is shared with
an expansion board.

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

The network controller
is defective.

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

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.

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

Network drivers are
not loaded, or driver
parameters do not match
current configuration.

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.

D–14

483941-001

Service Reference Guide

Troubleshooting Without Diagnostics

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.

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

Network controller
interrupt is shared with an
expansion board.

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

The network controller
requires drivers.

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

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

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

The files containing the
network drivers are
corrupted.

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

The cable is not securely
connected.

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

The network controller is
defective.

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

New network card will
not boot.

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

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.

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.

System setup utility
reports unprogrammed
EEPROM.

Unprogrammed EEPROM.

Flash the ROM.

Network controller stops
working without apparent
cause.

Service Reference Guide

483941-001

D–15

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.

Use the Device Manager to check
memory configuration.

You have run out of
memory to run the
application.

Check the application
documentation to determine the
memory requirements.

Memory count during POST
is wrong.

The memory modules
may not be installed
correctly.

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

Insufficient memory error
during operation.

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

Delete any TSRs that you do
not need.

You have run out of
memory for the
application.

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

Power LED flashes GREEN
five times, once every
second, followed by a two
second pause. Also, five
simultaneous beeps will be
heard.

Memory is installed
incorrectly or is bad.

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

483941-001

Service Reference Guide

Troubleshooting Without Diagnostics

Solving Processor Problems
.
Solving Processor Problems
Problem

Cause

Poor performance is
experienced.

Processor is hot.

Solution
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

483941-001

D–17

Troubleshooting Without Diagnostics

Solving CD-ROM and DVD Problems
Solving CD-ROM and DVD Problems
Problem

Cause

Solution

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

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

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

Non-bootable CD in
drive.

Try a bootable CD in the drive.

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

Drive is not connected
properly or not properly
configured.

Movie will not play in the
DVD drive.

Movie may be
regionalized for a
different country.

See the documentation that came
with the DVD drive.

Decoder software is not
installed.

Install decoder software.

Cannot eject compact disc
(tray-load unit).

Disc not properly seated
in the drive.

1. Reconnect power and data
cables to the drive.
2. Install correct device driver.

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.

Re-insert the CD with the label
facing up.

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

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.

CD or DVD disc is dirty.

Clean CD or DVD with a CD
cleaning kit.

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

1. Use Device Manager to remove
or uninstall the device in
question.
2. Restart the computer and let
Windows detect the device.

D–18

483941-001

Service Reference Guide

Troubleshooting Without Diagnostics

Solving CD-ROM and DVD Problems (Continued)
Problem

Cause

Recording audio CDs is
difficult or impossible.

Wrong or poor quality
media type.

Solution
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.

Solving Drive Key Problems
Solving DiskOnKey Problems
Problem

Cause

Solution

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

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

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

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

Drive Key is bootable.

Install the Drive Key after the
operating system boots.

Solving Internet Access Problems
Solving Internet Access Problems
Problem

Cause

Solution

Unable to connect to the
Internet.

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

Verify Internet settings or contact the
ISP for assistance.

Modem is not set up
properly.

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

Web browser is not set
up properly.

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

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.

Service Reference Guide

483941-001

D–19

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.)

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.

Cannot automatically
launch Internet programs.

D–20

You must log on to the
ISP before some
programs will start.

483941-001

Log on to the ISP and launch the
desired program.

Service Reference Guide

Troubleshooting Without Diagnostics

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. Under 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.

Service Reference Guide

483941-001

D–21

Troubleshooting Without Diagnostics

Diagnostic Front Panel LEDs and Audible Codes
Diagnostic Front Panel LEDs and Audible Codes
Activity

Beeps

Possible Cause

Recommended Action

Green Power LED
On.

None

Computer on.

None

Green Power LED
flashes every two
seconds.

None

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

Not support wake up by mouse/
keyboard.

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

Processor thermal
protection
activated:

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

A fan may be
blocked or not
turning.

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.

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

Should be Press Power button.

The heatsink/fan
assembly is not
properly attached
to the processor.

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.

D–22

Red Power LED
flashes five times,
one every second,
followed by a 2
second pause. Also
5 simultaneous
beeps will be
heard.

Red Power LED
flashes 6 times, one
every second,
followed by a 2
second pause. Also
6 simultaneous
beeps will be
heard.

Pre-video memory
error.

1. Reseat DIMMs. Power on the
system.
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.

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.

483941-001

Service Reference Guide

Troubleshooting Without Diagnostics

Diagnostic Front Panel LEDs and Audible Codes (Continued)
Activity
Red Power LED
flashes 8 times, one
every second,
followed by a 2
second pause. Also
8 simultaneous
beeps will be
heard.

Beeps
8

Possible Cause
Invalid ROM
based on bad
checksum.

Recommended Action
1. Reflash the system ROM with the
latest BIOS image.
2. Replace the system board.

Inclining beeps
when password
entered.

Rapid
incline

Incorrect
password entered.

Enter the correct password.

Declining beeps
when password
entered.

Rapid
decline

Correct password
entered.

No action required.

Service Reference Guide

483941-001

D–23

Troubleshooting Without Diagnostics

Diagnostic Front Panel LEDs and Audible Codes (Continued)
Activity
System does not
power on and LEDs
are not flashing.

Beeps

Possible Cause

Recommended Action

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.

D–24

483941-001

Service Reference Guide

Troubleshooting Without Diagnostics

Diagnostic Front Panel LEDs and Audible Codes (Continued)
Activity

Beeps

Possible Cause

System gives an
error message
stating that “Error
912 - computer
cover or side panel
has been removed.
Make sure that any
system access was
authorized and
press F1 to
continue”.

Continuous
beep for
5
seconds

The chassis side
cover is open or
would have been
removed after
previous power
on.

Recommended Action
1. Make sure that the Chassis side
cover is closed if not fix it as
directed in the assembling guide.
2. Ensure that any system access was
authorized, check all the hardware
ensuring that no hardware has
been changed or removed. Then
enter the BIOS setup by pressing
F10 then select Hardware Monitor
setup and enable the Reset Case
Open Status.
3. Refer to the F10 Utility Guide for
its functionality and any further
issues.
4. For maximum security, be sure to
establish a setup password. The
setup password prevents
unauthorized access to the
Computer Setup utility.

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.
the event that you lose power during the initial operating system installation process, use the
✎ InRestore
Plus! CD to install the operating system.

Service Reference Guide

483941-001

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 www.hp.com.
you take the computer to an authorized reseller, dealer, or service provider for service,
✎ Ifremember
to provide the setup and power-on passwords if they are set.
to the number listed in the warranty or in the Worldwide Telephone Numbers Guide on the
✎ Refer
Library CD for technical assistance.

D–26

483941-001

Service Reference Guide

E
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

483941-001

E–1

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