•If the power button LED is off, the computer is either turned off or is not receiving power.
–Reseat the power cable into both 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 that the power strip is turned on.
–Bypass power protection devices, power strips, and power extension cables to verify that the computer turns on properly.
–Ensure that the electrical outlet is working by testing it with another device, such as a lamp.
–Ensure that the main power cable and front panel cable are securely connected to the system board (see the Service Manual at support.dell.com).
NOTE: All front panel and back panel LEDs will turn off during sleep states.
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
1Write down the beep code.
2Run the Dell Diagnostics to identify the cause (see "Dell™ Diagnostics" on page 29).
3See "Contacting Dell" on page 72 for instructions on obtaining technical assistance.
Troubleshooting
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