Dell Precision Workstation 450 User Manual page 4

The computer is in a normal off condition;
the computer is connected to its electrical
outlet.
The computer is in a reduced power or
"sleep" state.
The BIOS is not executing.
A possible power supply or power cable
failure has occurred.
A possible system board failure has
occured.
A microprocessor and/or VRM mismatch
exists.
A possible VRM 0 failure has occurred.
A possible VRM 1 failure has occurred.
A possible VRM 0 and VRM 1 failure has
occurred.
Diagnostic Light Codes During POST
Light Pattern Problem Description
A possible BIOS failure has occurred; the
computer is in the recovery mode.
A possible microprocessor failure has
and then press the power button.
If the problem is still not resolved,
Press the power button to turn the computer on.
If the computer does not turn on, 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,
Use one of the appropriate methods to "wake up" the computer. See
If the problem is not resolved and you are trying to wake the computer with a USB mouse
or keyboard, subsitute the mouse or keyboard with a working PS/2 mouse or keyboard and
try to wake the computer.
Ensure that the microprocessor
If the problem is still not resolved,
Perform the procedure in "Power
If the problem is still not resolved,
Contact Dell for technical assistance.
Perform the procedure in "Microprocessor
Contact Dell for technical assistance.
Perform the procedure in "Microprocessor
Contact Dell for technical assistance.
Suggested Resolution
Run the BIOS Recovery Utility, wait for recovery completion, and then restart the computer.
Reinstall the microprocessor and restart the computer.
contact Dell for technical assistance.
contact Dell for technical assistance.
is seated correctly and restart the computer.
contact Dell for technical assistance.
Problems."
contact Dell for technical assistance.
Problems."
Problems."
"Advanced Features."