Question about ViewSonic OptiQuest Monitor

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Optiquest q20wb LCD has black screen & green power light flashing

My Optiquest q20wb LCD has black screen and power light is flashing. Tried unpluging LCD and restarting computer, and even switch out the cable, but this no change.

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  • rickyknows2 May 03, 2010

    I not the video card or cable since I try another LCD and it worked with same cable. Just connect both monitors and in my monitor preference - both monitor show up on the dual monitor option when both are turn on.

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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 ..

Posted on May 03, 2010

  • NilesOhio Sep 11, 2010

    I had a client's monitor do the same thing after a storm. I think the flashing green power light on the monitor with no video means that it needs sent in for service.

  • NilesOhio Sep 11, 2010

    After doing a bit more checking around, it's likely a blown capacitor on the power board. Google around a bit and you'll see an illustrated power board repair for the Q19WB, which is a similar monitor. I'm going to pop mine open to see if it's obvious which capacitor got nailed.

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I have a optiquest Q20WB monitor when i push the power botton the green light flashes but the monitor doesnt come on.


More likley to have bad caps like other Optiquest monitors as shown in my albums.
If you are going to DIY and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply (they should be replaced in a set), blown fuses; poor solder joints, 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 OPTIQUEST 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.

Basic LCD monitor troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

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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

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-Jon

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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

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