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You can troubleshoot your computer using indicators like diagnostic lights, and error messages during the operation of the computer.
Diagnostic power LED codes
Table 21. Diagnostic power LED codes
Power LED light status
Off
Steady/blinking amber
Blinking white light
Steady white
40
Troubleshooting your computer
Troubleshooting your computer
Possible cause
The computer is either turned
off or is not receiving power or in
Hibernation mode.
Computer fails to complete
POST or processor failure.
Computer is in sleep mode.
The computer is fully functional
and in the On state.
6
Troubleshooting steps
•
Re-seat the power cable in
the power connector on the
back of the computer and
the electrical outlet.
•
If the computer is plugged
into a power strip, ensure
that the power strip is
plugged into an electrical
outlet and is turned on. Also,
bypass power protection
devices, power strips, and
power extension cables to
verify that the computer
turns on properly.
•
Ensure the electrical outlet is
working by testing it with
another device, such as a
lamp.
•
Remove and reinstall any
cards.
•
Remove and reinstall the
graphics card, if applicable.
•
Ensure the power cable is
connected to the system
board and processor.
•
Press the power button to
bring the computer out of
the sleep mode.
•
Ensure all power cables are
securely connected to the
system board.
•
Ensure the main power cable
and front panel cable are
connected to the system
board.
If the computer is not
responding, do the following:
•
Ensure the display is
connected and turned on.