Workstation Setup and Quick Reference Guide

Setup and Quick Reference Guide 47
Diagnostic Light Codes During POST
Light Pattern Cause
off
off
off
off
No electrical power is supplied to the computer.
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.
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
= yellow
= green
= off