Troubleshooting 131
– 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 150 and "System Board Components" on page 212).
• 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.
– Ensure that the processor power cable is securely connected to the
system board (see "System Board Components" on page 150 and
"System Board Components" on page 212).
• If the power light is steady amber, a device may be malfunctioning or
incorrectly installed.
– Remove and then reinstall the memory modules (see "Memory" on
page 155).
– Remove and then reinstall any cards (see "Cards" on page 157).
• Eliminate interference. Some possible causes of interference are:
– Power, keyboard, and mouse extension cables
– Too many devices on a power strip
– Multiple power strips connected to the same electrical outlet
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