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DELL XPS 600 User Manual

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Advanced Troubleshooting
55
Advanced Troubleshooting
Diagnostic Lights
 
CAUTION: 
Before you begin any of the procedures in this section, follow the safety instructions 
located 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 panel (see "Front View (Doors Open)" on page 72). 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 sequence of the lights identify the problem.
Light Pattern
Problem Description
Suggested Resolution
The computer is in a normal "off" condition or 
a possible pre-BIOS failure has occurred.
The diagnostic lights are not lit after the 
system successfully boots to the operating 
system.
Plug the computer into a working electrical 
outlet. Also see "Power Problems" on page 49.
A possible processor failure has occurred.
Memory modules are detected, but a memory 
failure has occurred.
• If you have two or more memory modules 
installed, remove the modules, reinstall one 
module (see "Installing Memory" on 
page 80), 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 (see 
"Installing Memory" on page 80).
• If the problem persists, contact Dell (see