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Optiquest q20wb goes to black screen after 2 secondsthen turn it off and back on stays on for about 2 seconds again goes black and if you leave it on the video will come back and then turn off almost right away.

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First to check will be the power supply, look for bad caps with bulging tops first then report back so we can guide you further, see example of failed monitors due to bad caps: http://s807.photobucket.com/home/budm/allalbums

Posted on Feb 04, 2010

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1 Answer

Optiquest q20wb LCD has black screen & green power light flashing


Hi Rickyknows2,
If you are not hearing any beep I assume you are having problem with your video so, please ...
- open your PC and check whether your video card is well placed (sometimes it looks fine but you never know) remove it and put it back.
- If you used to remove often the cable from the PC, it might be that the pins from the monitor cable are even broke... please check.
- try to find another video card and replace it just to make sure its the video ...
- last... reset the bios (but I doubt that this is your problem)
chsers ..

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Viewsonic Optiquest Q20wb green blink light


It's an issue with the power supply, most likely the Capacitors (one or more) may be shot. Open it up if it is out of warrenty, look at the capacitors (they look like cans), if they are bulging at the top or even sides they are bad. This is a common problem with this monitor. Crappy Caps used in manufacturing. Replace all the caps with same rated caps and you should be good. Do your research on how to desolder the old ones off and proper installation of the new ones.

Aug 18, 2009 | Computers & Internet

1 Answer

Screen goes black,power light stays green. display only stays on a couple of seconds


This happened to me and I was able to fix it. I cracked it opened and found a bad capacitor, bought a replacement at Radio Shack and I'm back in business. Actually using it right now to post this.
-Jon

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I have a viewsonic optiquest monitor Q20WB and buttons not workin


Sounds like that monitor has reached the end of the road. I would recommend purchasing another monitor, other than view sonic. Purchase a Dell..they are great!

May 13, 2009 | ViewSonic Optiquest Q19wb LCD Monitor

1 Answer

Monitor flashes on then goes black.


I think you have the display shut off. the button on the bottom left will shut screen off. It will come on for a few seconds if you touch the screen, but will shut off again. just push the display button again and it should stay on.

Apr 02, 2009 | ViewSonic OptiQuest Monitor

1 Answer

Optiquest q20wb Screen goes blank after powering on


I'd like to report a success story. I had this same problem with my Q20WB. It sat for over a year in my garage. I eventually bought replacement capacitors, soldered them in, and now it works. You can find kits with the right capacitors preselected, or if you feel like it you can also buy them individually.

good luck

Mar 02, 2009 | ViewSonic OptiQuest Monitor

2 Answers

Optiquest q20wb Screen goes blank after powering off


I had the exact same problem. The screen went black and the green light flashed. I went ahead and took the monitor apart (scary) and took a look at the power supply circuitry. I saw 6 suspicious electrolytic caps on the board. Three 470uF 25V 105 degree C caps, two 1000uF 10V 105 degree C caps, and one 470uF 10V 105 degree cap. They all appeared to be slightly bulging and one even had a small hole in the top. I decided to replace all of them. The parts cost a little more than 5 bucks. I couldn't find a 470uF 10V cap at my local store so I bought a 16 V version instead, which is fine. Anyway, after replacing all 6 caps, the monitor works as good as new.

Mar 02, 2009 | ViewSonic Optiquest Q7b Flat panel TFT 17"...

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