Dell Precision T3400 (Late 2007) - Manual (Page 123)

Troubleshooting
123
R UN THE H ARDWARE T ROUBLESHOOTER — See "Hardware Troubleshooter" on
page 107.
Power Problems
CAUTION:
Before you begin any of the procedures in this section, follow the
safety instructions in the Product Information Guide.
I F THE POWER LIGHT IS GREEN AND THE COMPUTER IS NOT RESPONDING — See
"Diagnostic Lights" on page 100.
I F 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.
I F 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 148).
I F 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 148).
I F 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 157).
• Remove and then reinstall any expansion cards, including graphics cards (see "Cards"
on page 162).
E LIMINATE INTERFERENCE — Some possible causes of interference are: