Dell LATITUDE C510 - Manual (Page 81)

Type some characters on the external keyboard and verify that they appear on the
display. 4.
If you cannot verify these steps, you may have a defective external keyboard.
To verify that the problem is with the external keyboard, check the integrated
keyboard
Turn off the computer. 1.
Disconnect the external keyboard. 2.
Turn on the computer. 3.
In Windows XP, click the Start button, point to All Programs, point to Accessories, and
click Notepad. 4.
In Windows 98 or Windows 2000, click the Start button, point to Programs, point to
Accessories, and click Notepad.
Type some characters on the integrated keyboard and verify that they appear on the
display. 5.
If the characters appear now but did not with the external keyboard, you may have a defective
external keyboard.
Run the keyboard diagnostics tests -
See the PC-AT Compatible Keyboards tests in the Dell Diagnostics . If the tests indicate a
defective external keyboard, contact Dell.
Unexpected Characters
Disable the numeric keypad: Press to disable the numeric keypad. Verify that the light is not lit.
Drive Problems
NOTE: Fill out the Diagnostics Checklist as you complete these checks.
If you cannot save a file to a floppy drive