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Solving Problems 49
Power Problems
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions
located in the Product Information Guide.
RUN THE HARDWARE TROUBLESHOOTER — See "Resolving Software and Hardware Incompatibilities"
on page 64.
IF THE POWER LIGHT IS GREEN AND THE COMPUTER IS NOT RESPONDING — See "Diagnostic Lights"
on page 55.
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
"System Board Components" on page 78).
IF THE POWER LIGHT IS BLINKING AMBER — The computer is receiving electrical power, but an
internal power problem might exist.
• Ensure that the voltage selection switch is set to match the AC power at your location (if applicable).
IF THE POWER LIGHT IS STEADY AMBER — A device might be malfunctioning or incorrectly installed.
• Ensure that the processor power cable is securely connected to the system board power connector
(POWER12V) (see "System Board Components" on page 78).
• Remove and then reinstall the memory modules (see "Memory" on page 79).
• Remove and then reinstall any cards (see "Removing PCI and PCI Express Cards" on page 89).
• Remove and then reinstall the graphics card, if applicable (see "Removing PCI and PCI Express Cards"
on page 89).