Dell 745c, TJ021 manual Diagnostic Lights, Light Pattern Problem Description Suggested Resolution

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Diagnostic Lights

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.

To help you troubleshoot a problem, your computer has four lights labeled "1," "2," "3," and "4" on the front or back panel. The lights can be "off" or green. When the computer starts normally, the patterns or codes on the lights change as the boot process completes. If the POST portion of system boot completes successfully, all four lights display solid green for a short time, and then turn off.

If the computer malfunctions during the POST process, the pattern displayed on the LEDs may help identify where in the process the computer halted. If the computer malfunctions after a successful POST, the diagnostic lights do not indicate the cause of the problem.

NOTE: The orientation of the diagnostic lights may vary depending on the system type. The diagnostic lights can be either vertically or horizontally oriented.

Light Pattern

Problem Description

Suggested Resolution

 

 

 

 

The computer is in a normal "off" condition, or a

Plug the computer into a working

 

possible pre-BIOS failure has occurred.

electrical outlet and press the power

 

The diagnostic lights are not lit after the computer

button.

 

successfully boots to the operating system.

 

 

 

 

 

A possible BIOS failure has occurred; the

Run the BIOS Recovery utility, wait for

 

computer is in recovery mode.

recovery completion, and then restart the

 

 

computer.

A possible processor failure has occurred.

Reinstall the processor and restart the computer. For information on reinstalling the processor, see your online User’s Guide.

Memory modules are detected, but a memory failure has occurred.

•If you have one memory module installed, reinstall it and restart the computer. For information on reinstalling memory modules, see your online User’s Guide.

•If you have two or more memory modules installed, remove the modules, reinstall one module, and then restart the computer. If the computer starts normally, reinstall an additional module. Continue until you have identified a faulty module or reinstalled all modules without error.

•If available, install properly working memory of the same type into your computer.

•If the problem persists, contact Dell. For information on contacting Dell, see your online User’s Guide.

Quick Reference Guide

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Contents W . d e l l . c o m s u p p o r t . d e l l . c o m Quick Reference GuideFebruary TJ021 Contents Contents Finding Information How to use Windows XP What Are You Looking For? Find It Here Warranty informationClick the topic that describes your problem According to the operating system you orderedWhen you use Use the ServiceWhen contacting support Appropriate for your configuration, providing criticalMini Tower Computer Front View System ViewsYou Begin on page 13 for more information Blinking green The computer is in a power-saving modeNo light The computer is turned off Steady green The computer is in a normal operating stateMini Tower Computer Back View Though the AC power available in Japan is 100 Mini Tower Computer Back-Panel ConnectorsGreen a good connection exists between a 10-Mbps network Address. For more information, see your online User’s GuideComputer CapBefore You Begin Removing the Computer CoverBefore Working Inside Your Computer Mini Tower Computer Security cable slot Cover release latch Padlock ring Inside Your Computer System Board Components Jumper Setting Description Jumper SettingsSetting Up Your Computer Set Up Your Keyboard and Mouse Set Up Your Monitor Power Connections Solving ProblemsDell Diagnostics When to Use the Dell DiagnosticsInsert the Drivers and Utilities CD Tab Function Option FunctionSystem Lights Power Light Problem Description Suggested ResolutionTechnical assistance. For information on contacting Dell, see your online User’s GuideLight Pattern Problem Description Suggested Resolution Diagnostic LightsIf the computer has a graphics card If the problem still exists, install aRestart the computer Has integrated graphics, contact DellBeep Codes Resolving Software and Hardware Incompatibilities Using Microsoft Windows XP System RestoreRestoring the Computer to an Earlier Operating State Undoing the Last System RestoreReinstalling Windows XP Reinstalling Microsoft Windows XPGetting Started Quick Reference Guide Microsoft Windows Vista Before You Begin Drivers for Your Computer Using the Drivers and Utilities CDIndex IndexIndex
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