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Solving Problems 197
Boot Diagnostic Codes
The following table lists the codes for the diagnostic lights that occur while
the computer is performing the POST.
NOTE: If the computer is turned on and all four diagnostic lights are not on,
see "Preboot Diagnostic Codes."
Possible VRM 1 failure. Perform the procedure in "Microprocessor Problems."
Possible VRM 0 and VRM 1 failure. Perform the procedure in "Microprocessor Problems."
Possible memory riser board A failure. Perform the procedure in "System Memory Problems."
Possible memory riser board B failure. Perform the procedure in "System Memory Problems."
Possible memory riser board A and
riser board B failure.
Perform the procedure in "System Memory Problems."
Diagnostic Light Codes Before POST
(continued)
Light Pattern Cause Action
= yellow
= green
= off
A B C D
A B C D
A B C D
A B C D
A B C D