ViewSonic VP191b 19" LCD Monitor Logo
Josh Garrett Posted on Sep 16, 2006

Monitor Blanking I have a ViewSonic VP171b that goes black at random times (anywhere from 10 minutes to 3 hours of being turned on). The power light for the monitor stays on (green), but the screen goes completely black. There is no warning (doesn't flicker, or get bright, or anything like that). I have to turn it off and leave it off for some time (usually between 1 and 5 minutes) and then it works fine again for a while (again random length of time). It does it not matter what program I am running. I have updated and re-installed the monitor and graphics card drivers. I have opened up the case and 'fanned' it and it didn't appear to help (not overheating of the graphincs card, cooling system in case working properly). Wiggling the connectoins doens't seem to make a differnce either. The monitor has worked fine for about a year before this happend. It was plugged into 220v 50hz (within the monitor's rating) for about 3 months before the problem started to occur. It is now plugged into a transformer (120V). Any ideas? My guess is the backlight, but I'm not certain. Is an LCD monitor easy to fix by yourself?

  • 2 more comments 
  • Josh Garrett Sep 16, 2006

    Update: I paid a bit more attention to the latest occurance of the problem and the monitor did get slightly brighter before blanking out. Also, it has a barely audible high pitched sound just before going out (like the sound of a TV that is on, with no volume in a quiet room). Also, if I try to turn it on too soon(before the 1-5 minute 'cool-down' time), it will take 1-2 seconds to turn on, flash for a heart-beat, and then go blank again. When it does this, it also has that barely audible high-pitched sound.
    One last point, it is being used in an air conditioned room, so no overheating problems from the environment. I also have my cheap sub-woofer about 8" behind the monitor on the desk.

  • Anonymous Nov 13, 2007

    I have a Westinghouse that does the exact same thing, this is an external monitor for my laptop, will shut down from 10mins-3 hours as mentioned above, Still found no soloution.

    I know this is for a VS, but it may help my problem aswell.

  • Anonymous May 04, 2008

    I same issue for me, VP171B
    any idea of how to solve this ???

  • ahpeeyem Jun 04, 2008

    my VP171b does this as well, it sucks!

    It will work for a random amount of time (as you say, it can be hours or minutes) and then gets brighter for a few seconds, then goes black and the LED on the front panel stays on.

    After you turn the monitor off for a few minutes it's fine again for a random amount of time, usually not as long though.


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Buy a new monitor... It will make your eyes stop watering.

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