Filter
Top Products
70 Troubleshooting
IF THE POWER LIGHT IS BLINKING BLUE —
• The computer is in standby mode. Press a key on the keyboard, move the mouse, or
press the power button to resume normal operation.
• USB keyboard and mouse wake up the system if these devices are configured as wake
up devices in the operating system devices properties. Otherwise, press the power button.
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 103).
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 103).
IF THE POWER LIGHT IS STEADY AMBER — A device may be malfunctioning or
incorrectly installed.
• Remove and then reinstall all memory modules (see "Memory" on page 104).
• Remove and then reinstall any expansion cards, including graphics cards (see
"Removing a PCI Express Card" on page 121).
IF THE POWER LIGHT FLASHES AMBER AND THEN GOES OFF — It can be an internal
power problem.
• Ensure that the processor power cable is securely connected to the system board
power connector (12VPOWER). (See "System Board Components" on page 103).
ELIMINATE INTERFERENCE — Some possible causes of interference are:
• Power, keyboard, and mouse extension cables
• Too many devices connected to the same power strip
• Multiple power strips connected to the same electrical outlet
book.book Page 70 Tuesday, November 27, 2007 10:29 AM