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Troubleshooting 123
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Troubleshooting
Tools
Power Lights
WARNING: Before working inside your computer, read the safety information
that shipped with your computer. For additional safety best practices information,
see the Regulatory Compliance Homepage at
www.dell.com/regulatory_compliance.
WARNING: Always unplug your computer from the electrical outlet before
opening the cover.
The power button light located on the front of the computer illuminates and
blinks or remains solid to indicate different states:
• If the power light is green and the computer is not responding, see "Beep
Codes" on page 124.
• If the power light is blinking green, the computer is in standby mode. Press
a key on the keyboard, move the mouse, or press the power button to
resume normal operation.
• If the power light 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 the power strip is
plugged into an electrical outlet and the power strip is turned on.
– Bypass power protection devices, power strips, and power extension
cables to verify if the computer turns on properly.
– Ensure the electrical outlet is working by testing it with another
device, such as a lamp.
– Ensure the main power cable and front panel cable are securely
connected to the system board (see "System Board Components" on
page 13).