Service manual

Troubleshooting Your Computer: Dell Latitude CP
Getting Help.)
No. The computer's video controller on the system board may be defective. Run the
Video test group of 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.)
Troubleshooting an External Monitor
During POST, the computer checks to see if an external monitor is attached to the computer; if
so, the video control circuitry sends information to the external monitor rather than to the
computer's display. If no image appears in the external monitor you are using when the
computer boots, make a copy if the Diagnostics Checklist found in
Getting Help and fill it out as
you complete the following procedure.
1. Make sure the external monitor's video cable is firmly connected to the computer's
monitor connector, and verify that the monitor's power cable (if it has one) is firmly
plugged into an AC power source. Make sure the monitor is turned on.
2. Reboot the computer, and then adjust the monitor's brightness controls. Is the monitor
readable?
Allow one minute for the computer to initialize its components.
Yes. The problem is resolved.
No. Continue to step 3.
3. Raise the built-in display into viewing position, If necessary, and press the <Fn><F8>
key combination to switch the video image from the external monitor to the display.
4. Use the <Fn> down-arrow key or <Fn> up-arrow key combination to adjust the
brightness. Is the full display readable?
Yes. The external monitor may be defective. Continue to step 5.
No. The video controller on the system board may be defective. Run the Video test
group of the Dell Diagnostics. (See
Running the Dell Diagnostics, for instructions.) If you
cannot isolate the problem, call Dell for technical assistance. (See
Getting Help, for
instructions.)
5. Turn off the computer and any attached peripherals. Disconnect all peripherals from the
computer. Attach another external monitor to the computer.
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