Computer Screen Is Blank

| January 22, 2010

If your computer screen is blank, but your PC seems to be working, you might be able to fix it easily through a quick process of elimination. While this is normally the result of a power surge or other voltage problem that has damaged your PC, it could also be the result of a software update that changes the way your PC boots up.

computer screen is blankDiagnosing Computer Screen Is Blank

You can often easily rule out the monitor by unplugging it from the computer and trying to power on the display by itself. A diagnostic screen should briefly appear on the monitor telling you there is no signal from the computer. If you see this, the problem lies somewhere from the monitor cable to the computer. If you do not see a diagnostic screen, you should test the monitor on another PC. If you try the monitor on another PC and computer screen is blank, make sure you also swap out the cable from a monitor you know works. Check the end of the cable for bent pins and examine the cord for damage to the wire’s insulation. If you still do not see the diagnostic screen, then the monitor is probably bad.

Boots Up But Computer Screen Is Blank

While it’s unlikely, it’s still possible you received a bad Windows update that is causing your computer to boot into a low power mode. If the computer acts like it’s powering on, with the normal beeps and clicks and lights, try waiting until the computer is fully booted into Windows and then press and release the power button once. If the computer wakes up, you will need to go into the System BIOS and make sure any power saving features are disabled. Depending on the model of your computer, you will need to tap the F1 or F10 to enter the BIOS setup. Assuming you can see the screen at this point, look through the menu for the Power Saving feature and disable it.

If your computer screen is blank after these suggestions, you will probably need to take the computer in for service so they can run diagnostics on the power supply and the motherboard.

Other HP Articles:

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Category: HP

Dave

About the Author ()

Dave has been providing free computer repair and tech support advice online since 2002. Join us on our forums and be sure to subscribe to our newsletter for weekly tips and other helpful computer articles. Connect with me on: Google+

Comments (4)

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  1. i need help!! my computer is saying boot and select proper boot device insert boot media in selected boot device and press a key !!!! on hp-computer thank you!!

    • Dave Dave says:

      If you’re getting that while trying to boot, make sure you have no CDs or floppies in the computer. If you’re still getting that, go into the BIOS and make sure your hard drive is showing up. It’s possible your hard drive has failed or there is some type of configuration problem in Windows that needs to be repaired. You should join our forums for more help.

  2. my problem was no appear on my screen,but thre is a power,lghts and fan,how do i fix this…

  3. Courtneyy says:

    How do i get into the BIOS if my computer is stuck on the black screen with the “select boot device and press a key” words on it ?