Troubleshooting basic i/o functions, Troubleshooting a parallel printer – Dell OptiPlex GX1 User Manual

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External Components: Dell GX1 Small-Form-Factor System User's Guide

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procedures in "

" to verify that the card is configured and installed correctly.

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

A faulty cable between the I/O port and the peripheral device

A faulty peripheral device

Incorrect settings in the

System Setup program

Incorrect settings in the system's configuration files

Faulty I/O port logic on the system board

NOTE: With certain modems installed, the

Serial/Infrared Port Test Group

subtests may fail

because the modem appears to the diagnostics as a serial port, but it cannot be tested as a serial
port. If you have a modem installed and you experience a serial port test failure, remove the modem
and run the diagnostic tests again.

Troubleshooting Basic I/O Functions

If a system error message indicates an I/O port problem or the device connected to the port does not function
properly, follow these steps in the order indicated until the problem is resolved:

1. Enter the

System Setup program

and verify that the settings for the Serial Port 1, Serial Port 2, and

Parallel Port options are set to Auto.

2. Insert the Dell ResourceCD into the appropriate drive, reboot the system, and run the

Serial/Infrared

Ports Test Group

and/or the

Parallel Ports Test Group

in the

Dell Diagnostics

If any of the tests fail, the system board may be faulty. See "