Dell Dimension 8400 Manual

Dell Ikke kategoriseret Dimension 8400

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Dell™Dimension™8400ServiceManual

Before You Begin

Opening the Computer Cover

Technical Overview

Specifications

Advanced Troubleshooting

System Setup

Removing and Installing Parts

Closing the Computer Cover

Notes, Notices, and Cautions

Abbreviations and Acronyms

For a complete list of abbreviations and acronyms, see the Dell Dimension Owner's Manual.

IfyoupurchasedaDell™nSeriescomputer,anyreferencesinthisdocumenttoMicrosoft®

Windows®operating systems are not applicable.



Information in this document is subject to change without notice.

©2004DellInc.Allrightsreserved.

Reproduction in any manner whatsoever without the written permission of Dell Inc. is strictly forbidden.

Trademarks used in this text: Dell, the DELL logo, and Dimension are trademarks of Dell Inc.; Intel and Pentium are registered trademarks of Intel Corporation; Microsoft and

Windows are registered trademarks of Microsoft Corporation.

Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. Dell Inc. disclaims any

proprietary interest in trademarks and trade names other than its own.

Model DHM

November2004Rev.A00

NOTE: A NOTE indicates important information that helps you make better use of your computer.

NOTICE: A NOTICE indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.

CAUTION: A CAUTION indicates a potential for property damage, personal injury, or death.

NOTE: Some features or services may not be available for your computer or in certain countries.

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 Advanced Troubleshooting

Dell™Dimension™8400ServiceManual

Power Lights

Diagnostic Lights

Beep Codes

System Messages

Power Lights



The power button light located on the front of the computer illuminates and blinks or remains solid to indicate different states:

lIf the power light is green and the computer is not responding, see "Diagnostic Lights."

lIf the power light is blinking green, the computer is in standby mode. Press a key on the keyboard, move the mouse, or press the power button to

resume normal operation.

lIf the power light is off, the computer is either turned off or is not receiving power.

¡Reseat the power cable into both the power connector on the back of the computer and the electrical outlet.

¡If the computer is plugged into a power strip, ensure that the power strip is plugged into an electrical outlet and that the power strip is turned

on. Also bypass power protection devices, power strips, and power extension cables to verify that the computer turns on properly.

¡Ensure that the electrical outlet is working by testing it with another device, such as a lamp.

¡Ensure that the main power cable and front panel cable are securely connected to the system board.

lIf the power light is blinking, the computer is receiving electrical power, but an internal power problem might exist.

¡Ensure that the voltage selection switch is set to match the AC power at your location (if applicable).

¡Ensure that the processor power cable is securely connected to the system board.

lIf the power light is steady amber, a device might be malfunctioning or incorrectly installed.

¡Remove and then reinstall the memory modules.

¡Remove and then reinstall any cards.

¡Remove and then reinstall the graphics card, if applicable.

lEliminate interference. Some possible causes of interference are:

¡Power, keyboard, and mouse extension cables

¡Too many devices on a power strip

¡Multiple power strips connected to the same electrical outlet

Diagnostic Lights



To help you troubleshoot a problem, your computer has four lights labeled "A," "B," "C," and "D" on the back panel. The lights can be yellow or green. When

the computer starts normally, the lights flash. After the computer starts, all four lights display solid green. If the computer malfunctions, the color and