Dell XPS 420 (Late 2007) User Manual
Page 70
70
Troubleshooting
I
F
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.
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 103).
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 103).
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 104).
• Remove and then reinstall any expansion cards, including graphics cards (see
"Removing a PCI Express Card" on page 121).
I
F
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).
E
LIMINATE
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