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Setup and Quick Reference Guide 37
Diagnostic Light Codes During POST
A possible system board failure has
occurred.
Contact Dell for technical assistance.
A microprocessor and/or VRM
mismatch exists.
Perform the procedure in "Microprocessor Problems" in
your User’s Guide.
If the problem is still not resolved, contact Dell for
technical assistance.
A possible VRM 0 failure has
occurred.
Contact Dell for technical assistance.
A possible VRM 1 failure has
occurred.
Perform the procedure in "Microprocessor Problems" in
your User’s Guide.
If the problem is still not resolved, contact Dell for
technical assistance.
A possible VRM 0 and VRM 1
failure has occurred.
Contact Dell for technical assistance.
Light Pattern Problem Description Suggested Resolution
= yellow
= green
= off
A B C D
A B C D
A B C D
A B C D
A B C D
Light Pattern Problem Description Suggestion Resolution
A possible BIOS failure has
occurred; the computer is
in the recovery mode.
Run the BIOS Recovery utility, wait for recovery
completion, and then restart the computer.
A B C D
= yellow
= green
= off