Service manual

Troubleshooting Your Computer: Dell Latitude CP
For instructions, see the topic titled "Connecting an External Monitor" in the online
System User's Guide. If you do not have another external monitor, call Dell for technical
assistance. See
Getting Help, for instructions.
6. Reboot the computer, and adjust the monitor's brightness and contrast. Is the monitor
readable?
Allow one minute for the computer to initialize its components.
Yes. The original monitor is defective. Call Dell for technical assistance. See
Getting
Help, for instructions.
No. Call Dell for technical assistance. See Getting Help, for instructions.
Troubleshooting Serial and Parallel Ports
This section provides a procedure for troubleshooting the ports on your computer's serial and
parallel ports (shown in
Figure 3-3) and any attached peripheral devices. This section also
provides a procedure for troubleshooting the computer's infrared ports.
If a system error message indicates a port problem or if equipment connected to a port see ms
to perform incorrectly or not at all, the source of the problem may be any of the following:
● A faulty connection between the I/O port and the peripheral device
● Incorrect settings for system setup options
● Incorrect settings in the operating system's configuration files
● A faulty cable between the I/O port and the peripheral device
● A faulty peripheral device
● Faulty I/O port logic on the system board
● Conflicting COM port settings
● Lack of device drivers
Troubleshooting the Basic I/O Functions
Make a copy of the Diagnostics Checklist found in Getting Help and fill it out as you complete
the following procedure.
1. Check the settings for the Serial Port and Parallel Mode setup options.
For information on configuring the ports, see
Using the System Setup Program. Are the
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