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Troubleshooting 29
Troubleshooting
CAUTION: To guard against the likelihood of electric shock, laceration by moving
fan blades, or other expected injuries, always unplug your computer from the
electrical outlet before opening the cover.
CAUTION: Before you begin any of the procedures in this section, follow the
safety instructions that shipped with your computer.
Troubleshooting Tools
Power Light
CAUTION: Before you begin any of the procedures in this section, read and follow
the safety instructions provided with your computer.
The power light located on the front of the computer illuminates and remains
solid or blinks to indicate different states:
• If the power light is green and the computer is not responding, see
"Diagnostic Lights" in your
Service Manual
.
• 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 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.