Setup and Quick Reference Guide 47
yellow
yellow
green
yellow
Possible microprocessor failure.
yellow
yellow
green
green
Possible memory failure.
yellow
green
yellow
yellow
Possible expansion card failure or conflict.
yellow
green
yellow
green
Possible video card failure.
yellow
green
green
yellow
Possible floppy drive or hard drive failure.
green
green
green
yellow
After video initialization, an alert was found. Check
the computer screen for an error message.
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
A
B
C
D