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128 Troubleshooting
Blinking
Amber
A possible
motherboard, power
supply, or peripheral
failure has occurred.
• Power off computer, leaving the
computer plugged in. Press and hold
the power supply test button on the
back of the power supply unit.
If the power supply diagnostic light
next to the switch illuminates, the
problem may be with your system
board. Contact Dell (see
"Contacting
Dell
" on page 159
).
If the power supply diagnostic light
next to the switch does not illuminate,
disconnect all internal and external
peripherals, and press and hold the
power supply test button.If it
illuminates, there could be a problem
with a peripheral. Contact Dell (see
"Contacting Dell
" on page 159
).
• If the power supply diagnostic light
still does not illuminate, disconnect
the power supply from the system
board, then press and hold the power
supply button.
If the light illuminates, there could be
a problem with the system board.
If the power supply diagnostic light
still does not illuminate, the problem
is probably with the power supply.
Contact Dell (see
"Contacting Dell
"
on page 159
).
Steady
Amber
No CPU present.
• Reinstall the processor and restart the
system. If the computer still fails to
boot, inspect the processor socket for
damage.
• If the problem persists, contact Dell
(see
"Contacting Dell
" on page 159).
Light Pattern Problem Description Suggested Resolution