Dell OptiPlex GX150 - Manual (Page 69)

If you do not have another monitor, contact Dell for technical assistance.
7. Allow one minute for the computer to initialize its components, and then adjust the monitor's brightness and contrast controls.
Is the monitor readable?
Yes. The original monitor is defective. The problem is resolved.
No. Contact Dell for technical assistance.
Sound and Speaker Problems
Basic Checks:
l If using external speakers:
¡ Make sure that the speaker cables are firmly connected to the computer.
¡ Test the electrical outlet: verify that the speakers are connected to a working electrical outlet.
¡ Ensure that the speakers are turned on.
l
If using a sound card, make sure external audio devices are connected to the sound card ’s connectors and not to the microphone, line-out, or
line-in connectors on the system's front or back panels.
l
Adjust the volume.
l Reinstall the audio driver for your operating system.
l 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. Turn off nearby fans, lights, lamps, or other electrical devices.
Are the external speakers functioning properly?
Yes. One or more of those electrical devices was causing interference. The problem is resolved.
No. Go to step 2.
2. Enter system setup and make sure that Sound under the Integrated Devices option is set to On. Then exit system setup properly to save
the information, and reboot the system.
Is the device working properly?
Yes. The problem is resolved.
No. Go to step 3.
3. Run the Misc. PCI Devices tests in the Dell Diagnostics.
Did the tests complete successfully?
Yes. The controller is functioning properly. If the problem persists, contact Dell for technical assistance.
No. Contact Dell for technical assistance.
Printer Problems
Basic Checks:
l
Disconnect the cable from the computer and check the cable connector for bent or broken pins. Check for damaged or frayed cables.
l If the cable is not damaged, make sure that it is firmly connected to the computer.
l Test the electrical outlet: verify that the printer is connected to a working electrical outlet.
l
Ensure that the printer is turned on.
l 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. Perform the procedure in " Serial or Parallel Device Problems ."