Diagnostic light codes during post – Dell Precision T7400 (Late 2007) User Manual
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Troubleshooting Tools
Diagnostic Light Codes During POST
The power light displays a solid green for diagnostic light codes during POST.
(blinking)
amber
A processor mismatch
exists.
page 93 and then to
(blinking)
amber
Power supply cables
are not properly
connected.
Verify that both power
supply cables are plugged
in to the motherboard.
Light Pattern
Problem Description
Suggested Resolution
A possible processor failure has
occurred.
Reinstall the processor (see
and restart the computer.
Diagnostic Lights
Power
Light
Problem Description
Suggested Resolution
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