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Screen flashes on for a second, first says no signal, then flashes input analog next and then goes off

Monitor comes on for just a second...first says no signal, then flashes back on a second time and says "input analog....can u help please?

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  • rkel78 Apr 21, 2009

    yes. the computer boots up properly, it's like the monitor is having problems staying on....i am not very computer saavy, so i really don't know if that tells you anything...when the second time it flashes on only for a second, you can see the normal desktop in the background....with a small block in the middle on top of the desktop screen that says "input:analog"..and then it flashes off can make it start over by pressing the input button on the right side of the monitor...

  • rkel78 Apr 21, 2009

    i wouldn't know where to begin on that one.....not sure about the video card...

  • Art Ellison
    Art Ellison May 11, 2010

    I'm thinking that you probably have a video card problem or a display problem.
    Since you say you don't have much computer experience, we need to look at a couple of things.
    Can you start the computer in safe mode? You do this by pressing the F8 key when starting. Can't tell you exactly when to do it, but I normally tell my clients that as soon as they see any white printing on the monitor, start tapping on the F8 key. If your computer starts in safe mode, we can do a better job of troubleshooting.
    If you cannot get it to stay on in safe mode, can you get into the BIOS settings (like pressing Esc or F2 or whatever your computer tells you to do to enter Setup?

  • Art Ellison
    Art Ellison May 11, 2010

    Explain a little more-does this happen when you start up the computer? When you turn on the computer, does it really start up? Does the power supply fan start? Can you hear the hard drive spin up? If you're not sure, just tell me what happens. Also, how long has this been going on and when did it start?



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Have you tried cleaning its memory? or is your video card built in? if not try cleaning it (but be very careful you might scratch its terminals) try cleaning your memory using a rubber eraser. then clean the slots with a brush...

Posted on Apr 21, 2009


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Computer monitor comes on for 1 seconds, flashes "analog power save mode" and then goes black.

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