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My viewsonic VA912b goes thru a few minutes of a cycle upon turning on or waking up where it has a black screen, then a few seconds of normal display, then 10-15 sec of black, then a few seconds of normal, etc. until after about 5 minutes it finally stays on normally and is fine. The monitor makes a sound each time the normal display flashes on. Any ideas or just time to get a new monitor? This one is 3 or 4 years old.

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  • Louis Ebert May 11, 2010

    smithelev381, May need to open unit and inspect printed circuit boards. Do flashlight test when "black" screen is present and you know that pc has booted fully to the Win-desktop. Can you still see the desktop?? Then do some reading in my and other fixya CCFL back-lit lcd technicians profiles (buddymc , budmrtn) for info to help you make decision to DIY repair or contract out the work, or just trade unit for new. Your VA912b no different than any other cold cathode fluorescent lamp back-lit lcd monitor in it's basic design and operation!! Follow the links you find in the profiles and you too may even be so happy you did, that you will DIY repair and also buy a new unit, keeping the VA912b as a backup unit. Yes, your unit may need just one "thermally-intermittant" solder-joint to be resoldered to restore it back to use. Have you been to YOUTUBE to view DIY repair videos of "lcd monitor disassembly" and "lcd monitor repair" ??? Hope this helped. 12fixlouie

  • smithelev381 May 12, 2010

    Thanks for the help. It had 8 bad capacitors. Watched the youtube videos which really helped know what to do. Total cost of repair was $18 and several hours of time. Monitor now works great!!

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  • 11,361 Answers

Look for bad caps as shown in my pictures, common problem in all brands of LCD monitors.
http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VA912B/

Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
http://www.badcaps.net
http://en.wikipedia.org/wiki/Capacitor_plague

Posted on May 10, 2010

Testimonial: "Thanks so much for the help! My son and I ventured into unknown territory in trying this. We opened up the monitor and sure enough there were 8 bad capacitors. We tried the local Radio Shack but they didn't have the right sizes so went to a larger town and found an electronics supply store that was very helpful in getting the right capacitors - they knew we needed hi temp ones which were a bit more expensive - it pays to ask for help. We took the bad ones out and soldered the new ones in and presto the monitor now works great! Total cost was about $18 plus several hours of our time but what a sense of accomplishment to fix something yourself! BTW the videos on youtube are very helpful if you don't know what you're doing."

  • Bud Martin
    Bud Martin May 13, 2010

    Glad to hear a successful repair works, it is not that hard if you have the right information.

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Posted on Jan 02, 2017

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1 Answer

Va912b monitor flashes on for a second then goes black, how can I fix it? I need immediate help.


Please see my pictures here if you are going to DIY repair: http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VA912B/

Common problem in LCD monitors, see other failed Viewsonic and other brands in my albums.
Please post back what you find so we can guide you further.
http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net

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