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36 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, that
indicates no network communication exists. Replace the network cable. For a description of network lights,
see "Controls and Lights" on page 101.
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 page 49.
IF THE POWER LIGHT IS GREEN AND THE COMPUTER IS NOT RESPONDING — See "Diagnostic Lights" on
page 43.
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. Also 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 page 61).
IF THE POWER LIGHT IS STEADY AMBER — A device might be malfunctioning or incorrectly installed.
• Ensure that the 12 volt power connector (12V) is securely connected to the system board (see page 61).
• Remove and then reinstall the memory modules (see page 64).
• Remove and then reinstall any cards (see page 66).
• Remove and then reinstall the graphics card, if applicable (see page 71).