Dell Precision 420 User Manual
Page 36
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External Components: Dell Precision™ WorkStation 420 Systems User's Guide
Overview
This section provides troubleshooting procedures for equipment that connects directly to the input/output (I/O) panel of your computer, such as your
monitor, keyboard, mouse, or printer. Before performing any of the procedures in this section, see "
Checking Connections and Switches
." Then
perform the troubleshooting procedures for the equipment that is malfunctioning.
You need your Dell Precision ResourceCD to perform the procedures in this section.
Troubleshooting the Monitor
Troubleshooting video problems involves determining which of the following is the source of the problem:
l
Monitor or monitor interface cable
l
Video controller
The procedures in this section troubleshoot problems with the monitor and the monitor interface cable only.
If information on the monitor screen is displayed incorrectly or not at all, perform each of the following steps in the order indicated until the problem
is resolved:
1. Turn on the system, including any attached peripherals.
2. Adjust the switches and controls as specified in the monitor's documentation to correct the video image, including the horizontal and vertical
position and size.
3. If your monitor is equipped with a self-test function, run the monitor self-test (refer to your monitor manual to determine if your monitor has a
self-test function).
4. Insert the Dell Precision ResourceCD in the CD-ROM drive, reboot the system, and run the Video test group in the
Dell Diagnostics
.
5. Turn off the system and disconnect it from the electrical outlet. Swap the monitor with one of the same type that is working, and reconnect the
system to an electrical outlet.
6. Reboot the system and run the Video test group again.
If the tests complete successfully, the original monitor was faulty. If the tests still fail, the video controller on the system board may be faulty.
See "
Getting Help
" for instructions on obtaining technical assistance.
Troubleshooting the Keyboard
This procedure determines what kind of keyboard problem you have. If a system error message indicates a keyboard problem when you start the
computer system or if the keyboard does not operate as expected, perform the following steps in the order indicated until the problem is resolved:
1. If the keyboard or its cable shows signs of physical damage or if the keys do not work, replace the keyboard with a working keyboard.
2. Insert the Dell Precision ResourceCD in the CD-ROM drive, reboot the system, and run the Keyboard test group in the
Dell Diagnostics
.
3. If the Keyboard Interactive Test fails, replace the keyboard.
4. If the Keyboard Controller Test fails, the system board may be faulty. See "
Getting Help
" for instructions on obtaining technical assistance.
Troubleshooting the Mouse
Troubleshooting Basic I/O Functions