Dell XPS 420 (Late 2007) - Manual (Page 66)

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Troubleshooting
T EST THE KEYBOARD — Connect a properly working keyboard to the computer, then
try using the keyboard.
W ORKING W ITH AN U S B K EYBOARD — During the first system boot, the operating
system takes time to configure the USB keyboard. Reboot the system to configure the
keyboard faster.
U S B K EYBOARD OR M OUSE F AILURE — Connect the device to a different USB port
and check if it starts working.
R UN THE H ARDWARE T ROUBLESHOOTER — See "Troubleshooting Software and
Hardware Problems in the Microsoft Windows Vista™ Operating System" on page 93.
Lockups and Software Problems
CAUTION:
Before you begin any of the procedures in this section, follow the
safety instructions in the Product Information Guide.
The computer does not start up
C HECK THE DIAGNOSTIC LIGHTS — See "Diagnostic Lights" on page 76.
E NSURE THAT THE POWER CABLE IS FIRMLY CONNECTED TO THE COMPUTER AND TO
THE ELECTRICAL OUTLET
The computer stops responding
NOTICE:
You may lose data if you are unable to perform an operating system
shutdown.
T URN THE COMPUTER OFF — If you are unable to get a response by pressing a key on
your keyboard or moving your mouse, press and hold the power button for at least
8 to 10 seconds (until the computer turns off), and then restart your computer.
A program stops responding
E ND THE PROGRAM —
1 Press simultaneously to access the Task Manager.
2 Click the Applications tab.
3 Click to select the program that is no longer responding.
4 Click End Task.
book.book Page 66 Tuesday, November 27, 2007 10:29 AM