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48 Setup and Quick Reference Guide
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green
yellow
yellow
green
Possible system board resource and/or hardware failure.
green
yellow
green
green
Possible system board resource and/or hardware failure.
green
green
yellow
yellow
Possible expansion card failure or conflict.
yellow
green
green
green
Possible USB failure.
green
green
green
green
Normal operating condition after POST.
Diagnostic Light Codes During POST (continued)
Light Pattern Cause
= yellow
= green
= off
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D