Dell Precision 530 Guide De Configuration Et De Référence Rapide page 33

Diagnostic Light Codes Before POST
The following table lists the codes for the diagnostic lights that occur before
the computer begins the POST.
D i a g n o s t i c L i g h t C o d e s B e f o r e P O S T
Light Pattern Cause
No electrical power is supplied to the
computer.
A B C D
Normal off condition. Computer is
connected to its electrical outlet.
A B C D
Computer is in a reduced power or
"sleep" state.
A B C D
BIOS is not executing.
A B C D
Possible power supply or power cord
failure.
A B C D
Possible system board failure.
A B C D
= y e l l o w
= g r e e n
= o f f
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Action
Connect the computer to its electrical outlet. Ensure that
the front-panel power light is on. If the power light is off,
ensure that the computer is connected to a working
electrical outlet, and then press the power button.
If the problem is still not resolved, contact Dell for
technical assistance.
Ensure that the front-panel power light is on. If the power
light is off, ensure that the computer is connected to a
working electrical outlet, and then press the power button.
When the computer is operating normally, it can be
automatically or remotely started as long as it remains
connected to an electrical outlet. For more information, see
"Power Management" in the User's Guide.
If the problem is still not resolved, contact Dell for
technical assistance.
Use one of the appropriate methods to "wake up" the
computer. See "Power Management" in the User's Guide.
If the problem is still not resolved, contact Dell for
technical assistance.
See "Reset Corrupted BIOS Settings" in the User's Guide.
See "Power Problems" in the User's Guide.
Contact Dell for technical assistance.
Setup and Quick Reference Guide
33