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Quick Reference Guide 25
green
green
green
yellow
A possible USB failure has occurred. Reinstall all USB devices, check cable
connections, and then restart the computer.
yellow
yellow
yellow
green
No memory modules are detected.
• If you have one memory module installed,
reinstall it and restart the computer. For
information on reinstalling the memory
module, see your online
User’s Guide
.
• If you have two memory modules installed,
remove the modules, reinstall one module,
and then restart the computer. If the computer
starts normally, reinstall an additional module.
• If available, install properly working memory
of the same type into your computer.
• If the problem persists, contact Dell.
yellow
green
yellow
green
Memory modules are detected, but a
memory configuration or compatibility
error exists.
• Ensure that no special memory module/memory
connector placement requirements exist. For
information on memory modules, see your
online
User’s Guide
.
• Verify that the memory modules that you are
installing are compatible with your computer.
• If the problem persists, contact Dell.
yellow
green
green
green
An error occurred prior to boot.
• Ensure that the cables are properly connected
to the system board from the hard drive, CD
drive, and DVD drive.
• Check the computer message that appears
on your monitor screen.
• If the problem persists, contact Dell.
green
green
green
green
The computer is in a normal operating
condition after POST.
None.
Light
Pattern
Problem Description Suggested Resolution