Dell Latitude D630 - Manual (Page 99)

Troubleshooting 99
12
Troubleshooting
Diagnostic Lights
CAUTION: Before you begin any of the procedures in this section, follow the
safety instructions that shipped with your computer.
Your computer has three keyboard status lights located above the keyboard.
During normal operation, the keyboard status lights display the current status
(on or off) of the Num Lock, Caps Lock, and Scroll Lock features. If the
computer starts without error, the lights flash, and then turn off. If the
computer malfunctions, however, you can use the status of the lights to help
identify the problem.
NOTE: After the computer completes POST, the Num Lock light may remain on,
depending on your BIOS settings. For more information on using the system setup
program, see "System Setup Program" on page 135.
Diagnostic Light Codes During POST
To troubleshoot a problem with your computer, read the sequence of the
keyboard status lights in order from left to right (Num Lock, Caps Lock, and
then Scroll Lock). If the computer malfunctions the individual lights display a
status of either On , Off , or Flashing .