Service manual

Troubleshooting Your Computer: Dell Latitude CP
6. Insert your diagnostics diskette into drive A, and reboot the computer. Then Run the
Hard-Disk Drive test group. Does your drive pass all the tests?
Yes. Continue to step 7.
No. Go to step 8.
7. Replace your diagnostics diskette with the operating system diskette, and reboot the
computer. Does the operating system load now?
Yes. The hard-disk drive may contain a corrupted operating system or it may have bad
sectors. Re-install the operating system as described in the documentation that
accompanied your operating system. If reinstalling the operating system does not
correct the problem, continue to step 8.
No. Continue to step 8.
8. Call Dell for technical assistance.
See
Getting Help, for instructions.
Troubleshooting an External Keyboard or External Keypad
During POST, the computer checks to see if an external keyboard or keypad is connected. If
an external keyboard is connected, the computer recognizes both the built-in and the external
keyboards. If an external keypad is connected, the computer recognizes the external keypad
and the built-in keyboard, but does not recognize the embedded numeric keypad. If an
attached external keyboard or keypad does not work when you boot the computer, make a
copy of the Diagnostics Checklist found in Getting Help and fill it out as you complete the
following procedure.
NOTE: The computer's PS/2 connector supports two devices with the use of a PS/2 "Y"
adapter.
1. Make sure the cable from the external keyboard or keypad is firmly connected to the
external keyboard/keypad/mouse connector on the back of the computer. (See
Checking Connections.)
2. If you are using a keyboard with various switch settings, make sure the switch is set to
PS/2, Enhanced XT/AT, or PC/AT.
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