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External Components: Dell™ OptiPlex™ GX110 System User's Guide

If your system does not have a CD-ROM drive, you need a copy of the Dell Diagnostics media to perform the procedures in this section. Use the Program Diskette Maker, if necessary, to make a copy from the diskette image on the hard-disk drive.

Troubleshooting the Monitor

Troubleshooting video problems involves determining which of the following is the source of the problem:

• Monitor or monitor interface cable

• 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. Insert the Dell Diagnostics media into drive A, reboot the system, and run the Video test group in the Dell Diagnostics.
   
   
4. 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.
   
   
5. 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 Diagnostics media into the appropriate 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

This procedure determines what kind of mouse problem you have. If a system error message indicates a mouse problem when you start the computer system or if the mouse does not operate as expected, perform the following steps in the order indicated until the problem is resolved:

1. Clean the mouse as instructed in your mouse documentation.

   Most mice have a ball that can be removed and cleaned of debris by turning the mouse upside down and removing a cover on the bottom of the mouse. Also remove any lint or other debris that has accumulated on the bottom of the mouse.

2. If the mouse or its cable shows signs of physical damage or if the buttons do not work, replace the mouse with a working mouse.
   
   
3. Insert the Dell Diagnostics media into the appropriate drive, reboot the system, and run the Mouse Test in the Dell Diagnostics.
   
   
4. If the Mouse Test fails, the system board may be faulty. See "Getting Help" for instructions on obtaining technical assistance.

Troubleshooting I/O Ports

This section provides a procedure for troubleshooting the ports on your computer's I/O panel and the equipment connected to them, such as a printer, scanner, or other peripheral device.

If a system error message indicates a port problem or if equipment connected to a port seems 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

If any of the tests fail, the system board may be faulty. See "Getting Help" for instructions on obtaining technical assistance.

If the problem persists, go to "Troubleshooting a Parallel Printer" or "Troubleshooting a Serial I/O Device," depending on which device appears to be malfunctioning.

Troubleshooting a Parallel Printer

If the information in "Troubleshooting Basic I/O Functions" indicates that the problem is with a parallel printer, perform the following steps in the order indicated until the problem is resolved:

1. Reinstall the printer device driver.

   See the documentation for the printer and for your operating system for instructions on reinstalling the printer driver.

2. Turn off the parallel printer and computer, replace the parallel printer interface cable with a known working cable, and turn on the parallel printer and computer.

If the problem is resolved, the original printer cable was faulty.

3. Run the parallel printer's self-test.

If the test fails, the printer is faulty.