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54 Solving Problems
Power Problems
. CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product
Information Guide.
CHECK THE NETWORK LIGHTS ON THE BACK OF THE COMPUTER — If the link integrity light is off (see
see "Controls and Lights" on page 131), no network communication is occurring. Replace the network
cable.
RESTART THE COMPUTER AND LOG ON TO THE NETWORK AGAIN
CHECK YOUR NETWORK SETTINGS — Contact your network administrator or the person who set up
your network to verify that your network settings are correct and that the network is functioning.
RUN THE HARDWARE TROUBLESHOOTER — See "Resolving Software and Hardware Incompatibilities"
on page 71.
IF THE POWER LIGHT IS GREEN AND THE COMPUTER IS NOT RESPONDING — See "Diagnostic Lights"
on page 61.
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 in the power connector on the back of the computer and the electrical outlet.
• Bypass power strips, power extension cables, and other power protection devices to verify that the
computer turns on properly.
• Ensure that any power strips being used are plugged into an electrical outlet and are turned on.
• 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
"System Board Components" on page 79).
IF THE POWER LIGHT IS BLINKING AMBER — The computer is receiving electrical power, but an
internal power problem may exist.
• Ensure that the voltage selection switch is set to match the AC power at your location (if applicable).
• Ensure that all components and cables are properly installed and securely connected to the system
board (see "System Board Components" on page 79).
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