Dell OptiPlex GX240 - Manual (Page 160)

Solving Problems 163
• Disconnect the cable from the computer and check the cable
connector for bent or broken pins. Check for damaged or frayed cables.
• If the cable is not damaged, make sure that it is firmly connected to
the computer.
• Test the electrical outlet. Verify that the device is connected to a
working electrical outlet.
• Verify that the device is turned on.
• Check for interference: electrical appliances on the same circuit or
operating in close proximity to the computer can cause interference.
If the problem still exists after you complete the basic checks, fill out the
Diagnostics Checklist as you perform the following steps:
1 Enter system setup and check the Integrated Devices option settings.
Then exit system setup properly to save the information, and reboot
the computer.
For a serial device, check the Serial Port options; for a parallel device,
check the Parallel Port options. See the device’s documentation for
additional information on port settings and configuration
requirements.
Is the device working properly?
Yes. The problem is resolved.
No. Go to step 2.
2 Run the Serial Ports device group and/or the Parallel Ports device
group in the Dell Diagnostics .
These device groups check the basic functions of the system board's
I/O port logic. If a printer is connected to the parallel port, the Parallel
Ports device group tests the communication link between the system
board's I/O port logic and the printer.
Do the tests complete successfully?
Yes. Go to step 3.
No.
Contact Dell for technical assistance.
3 If the problem is confined to a particular application program, see the
application program's documentation for specific port configuration
requirements.
Is the device working properly?