90 Troubleshooting Tools
The power supply diagnostic LED located on the back of the computer
indicates different states of the power supply. To test the power supply, press
the power supply test switch.
• If the power supply diagnostic LED is green, power is available for the
power supply.
• If the power supply diagnostic LED is off:
– The power supply is not receiving power — Ensure that the main
power cable is connected to the system.
– The power supply is not working — This issue occurs either due to a
bad power supply or a device attached to the power supply.
To resolve the issue, contact Dell (See "Contacting Dell" on page 141).
Beep Codes
Your computer may emit a series of beeps during start up. The series of beeps
is called a beep code and can be used to help identify a problem with your
computer.
If your computer emits a series of beeps during start-up:
1
Write down the beep code.
2
Run the Dell Diagnostics to identify the cause (see "Dell Diagnostics" on
page 95).
book.book Page 90 Friday, April 25, 2008 3:58 PM
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