Dell OptiPlex GX1 User Manual page 62

Dell Diagnostics: Dell OptiPlex GX1 Small-Form-Factor System User's Guide
Another possible cause for errors is the external device. Use the documentation that came with the
peripheral to troubleshoot it and confirm that it is working properly. (Most printers have a self-test.)
After you eliminate incorrect system configuration information settings, peripheral malfunctions, and software
errors as potential causes of port problems, you can run the subtests in the Parallel Ports Test Group to
check your hardware. Although the following symptoms can be caused by faulty peripherals or software
errors, they might also suggest a port problem:
If a peripheral works intermittently or produces intermittent errors, the port may be faulty.
If the computer displays an error message that is related to the external device connected to a port, but
corrections to the device do not resolve the error, run the appropriate subtest in the Parallel Ports Test
Group.
If your software and the Dell Diagnostics do not recognize that you have a parallel port, you should
check the Parallel Port category in the
subtest in the Parallel Ports Test Group.
SCSI Devices Test Group
The subtests in the SCSI Devices Test Group check the functionality of up to four SCSI host adapters and
all the SCSI devices attached to them.
NOTES: Before conducting these subtests on CD-ROM drives, insert a CD with audio and data
tracks (such as a multimedia CD) into each CD-ROM drive. All of the subtests, except for the Audio
Output Test, require a CD with data tracks. The Audio Output Test requires a CD with audio tracks.
If a CD-ROM drive is empty or if it contains a CD that does not have the required data or audio tracks
(depending on the subtest[s] being conducted), the subtest(s) will fail.
The seven subtests in the SCSI Devices Test Group confirm the following drive functions:
Internal Diagnostic
Causes the device to run its internal self-test.
Seek Test
Checks the device's ability to search for a specified track on the device and to position its
read/write heads to all tracks.
Read Test
Positions the read/write heads at each block of the device for reading data and verifies that all
tracks on the device can be read correctly.
Write Test
Positions the read/write heads at each block of the device and verifies that all tracks on the
device can be written to correctly.
Audio Output Test
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System Setup program, and if necessary, run the appropriate