Service manual

Troubleshooting Your Computer: Dell Latitude CP
The switch settings are usually on the bottom of the keyboard, sometimes behind a
panel tab.
3. Reboot the computer. During the boot routine, do the Num Lock, Caps Lock, and scroll
Lock indicators on the external keyboard flash momentarily?
Yes. Continue to step 4.
No. You may have a defective keyboard port fuse. Go to step 7.
4. Does the computer recognize the external keyboard or keypad?
Use the external keyboard or keypad to type some characters. Do they appear on the
display?
Yes. The problem is resolved.
No. Continue to step 5.
5. Turn off the computer, and disconnect the external keyboard or keypad from the
computer.
6. Reboot the computer. Is the computer recognizing the built-in keyboard?
Allow one minute for the computer to initialize its components. Then use the computer's
built-in keyboard to type some characters. Do the characters appear on the display?
Yes. The external keyboard may be defective. Run the Keyboard test group in the Dell
Diagnostics. (See
Running the Dell Diagnostics, for instructions.) If you cannot isolate
the problem after running the Diagnostics, call Dell for technical assistance. (See
Getting Help, for instructions.)
No. The computer's keyboard controller on the system board may be defective. Run the
Keyboard Controller Test in the Dell Diagnostics. (See
Running the Dell Diagnostics, for
instructions.) If you cannot isolate the problem after running the diagnostics, call Dell for
technical assistance. (See
Getting Help, for instructions.)
7. Call Dell for technical assistance.
See
Getting Help, for instructions.
Troubleshooting Memory
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