Troubleshooting
Diagnostic and Power LED codes
Table 31. Power LED states
Power LED light status Possible cause Troubleshooting steps
O The computer is either turned
o or is not receiving power or in
Hibernation mode.
• 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.
Steady/blinking amber Computer fails to complete
POST or processor failure.
• 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.
Slow Blinking white light Computer is in sleep mode.
• 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.
Steady white The computer is fully functional
and in the On state.
If the computer is not
responding, do the following:
• Ensure the display is
connected and turned on.
• If the display is connected
and turned on, listen for a
beep code.
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Troubleshooting 67
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