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•If the monitor display is blank, the computer may be in suspended, or hibernate, state. Push and release the power button, move the mouse, or press a key on the keyboard to bring the computer out of the suspended state.
•Disconnect the monitor interface cable from the computer and check the cable connector for bent or broken pins. Check for damaged or frayed cables.
•If the monitor interface cable is not damaged, ensure that it is firmly connected to the computer.
•Adjust brightness and contrast settings on the monitor.
If the problem still exists after you complete the basic checks, fill out the Diagnostics Checklist as you perform the following steps:
1Turn off the computer, wait 30 seconds, and then turn the computer back on.
2Allow 1 minute for the computer to initialize its components, and then adjust the monitor's brightness and contrast controls.
Is the monitor readable?
Yes. The problem is resolved. No. Go to step 3.
3Turn off nearby fans, lights, lamps, or other electrical devices.
Is the monitor readable?
Yes. One or more of those devices was causing interference. The problem is resolved.
No. Go to step 4.
4Turn off the computer and the monitor, swap the monitor power cable with a known working cable such as the computer cable, and then turn on the computer and monitor.
Is the monitor working properly?
Yes. You need a new power cable. Contact Dell for technical assistance. No. Go to the next question.
Do you have another monitor that is working properly? Yes. Go to step 5.