Laptop User Manual
90 Troubleshooting
Fill out the Diagnostics Checklist (see "Diagnostics Checklist" on page 139) as you perform the various
checks.
NOTE: Use the integrated keyboard when running the Dell Diagnostics or the system setup program. When you
attach an external keyboard, the integrated keyboard remains fully functional.
External keyboard problems
NOTE: When you attach an external keyboard, the integrated keyboard remains fully functional.
C
HECK THE KEYBOARD CABLE — Shut down the computer. Disconnect the keyboard cable and check it for
damage, and firmly reconnect the cable.
If you are using a keyboard extension cable, disconnect it and connect the keyboard directly to the
computer.
CHECK THE EXTERNAL KEYBOARD
1
Shut down the computer, wait 1 minute, and turn it on again.
2
Verify that the numbers, capitals, and scroll lock lights on the keyboard blink during the boot routine.
3
From the Windows desktop, click
Start
→
All Programs
→
Accessories
→
Notepad
.
4
Type some characters on the external keyboard and verify that they appear on the display.
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
1
Shut down the computer.
2
Disconnect the external keyboard.
3
Turn on the computer.
4
From the Windows desktop, click
Start
→
All Programs
→
Accessories
→
Notepad
.
5
Type some characters on the internal keyboard and verify that they appear on the display.
If the characters appear now but did not with the external keyboard, you may have a defective external
keyboard. Contact Dell (see "Contacting Dell" on page 138).
RUN THE KEYBOARD DIAGNOSTICS TESTS — Run the PC-AT Compatible Keyboards tests in the Dell Diagnostics
(see "Dell Diagnostics" on page 79). If the tests indicate a defective external keyboard, contact Dell (see
"Contacting
Dell" on page 138
).
Unexpected characters
DISABLE THE NUMERIC KEYPAD — Press <Num Lk> to disable the numeric keypad if numbers are displayed
instead of letters. Verify that the numbers lock light is not lit.
Lockups and Software Problems
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the
Product
Information Guide
.