S olv ing Pr oble m s 1655 Run the VESA/VGA Interface tests in the Dell Diagnostics.Did any of the tests fail?Yes. The video controller on the system board may be defective.Contact Dell for technical assistance.No. Go to step 6.6 Turn off the computer and the monitor, connect another monitor tothe computer, and then turn them on.If you do not have another monitor, contact Dell for technicalassistance.7 Allow one minute for the computer to initialize its components, andthen 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 ProblemsBasic Checks:• If using external speakers:– Make sure that the speaker cables are firmly connected to thecomputer.– Test the electrical outlet: verify that the speakers are connected toa working electrical outlet.– Ensure that the speakers are turned on.• If using a sound card, make sure external audio devices are connectedto the sound card’s connectors and not to the microphone, line-out, orline-in connectors on the computer's front or back panels.• Adjust the volume.• Reinstall the audio driver for your operating system.• Check for interference: electrical appliances on the same circuit oroperating in close proximity to the computer can cause interference.If the problem still exists after you complete the basic checks, fill out theDiagnostics Checklist as you perform the following steps:
