Question about ViewSonic Optiquest Q19wb LCD Monitor

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When i open my PC...my optiquest q 19wb come on but just for a few seconds.....i tried closing the PC and unplug it and also unplug the screen..then after about 10 minutes plug the screen and last plug the Pc..it still does the same thing..i did that again overnight and it work for about 10 minutes..but then again the same thing happen..I even tried the screen on my other PC and the same thing happen...I need your help..All of this happen after i change the resolution..I need your help..thanks...Pierre

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Look for bad caps as hsown in my pictures here:
http://s807.photobucket.com/albums/yy352/budm/Optiquest%20Q19WB/

Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Please post back what you find.

Posted on Aug 31, 2010

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Please help me my optiquest q19wb model #vs11443 is shuting off aftre 1 second i opened it and no capacier were damadged what is wrong... the unit is not old 2 years i am not rich and want to save...


The usual problem with this symptom is an CCFL power supply failure. The inverter is the board that powers the backlights so you can see what is on the screen. If you look really close and with a flashlight, you may be able to see the dark shadow of the image on the screen. Without the backlight, the LCD is useless.

You can get parts from places like http://www.lcdalternatives.com/ or eBay. Search for the model number and "repair" (e.g. "Optiquest Q19wb repair") on eBay.

Apr 12, 2011 | ViewSonic Optiquest Q19wb LCD Monitor

1 Answer

I have an Acer 1916W monitor that will run fine for a time but then start to slightly flicker. If I continue to use it for an extended period, it will go black. Turning it off then on will restore the...


Same model can have up to 3~4 versions of the board.
http://s807.photobucket.com/albums/yy352/budm/Acer%20AL1916W/

http://s807.photobucket.com/albums/yy352/budm/ACER%20AL1916W%20Abd/

http://s807.photobucket.com/albums/yy352/budm/Optiquest%20Q19WB/

Bad caps can look normal but they can have high ESR (Equivalent Series Resistance, low ESR type is a must for switching power supply), you will need cap meter that can read ESR.

You should take the DC voltage reading of the backlight inverter, it should be aorund 16~18vdc before and after the problem appears, it can also be cold solder joints, hope fully not at the lamp connections.
See my albums for bad caps and lamps.
What ever the DC rating of the caps that were installed originally by the factory, they should be OK.

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm/

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.

Dec 28, 2010 | Acer AL1916W 19" LCD Monitor

1 Answer

The sreen close after 10 second every time


It does the same when hooked up to another PC?
It may have bad caps as hswon here:
http://s807.photobucket.com/albums/yy352/budm/Optiquest%20Q19WB/

If you are going to DIY and already try the monitor with another PC, 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/albums/yy352/budm/
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 and TV troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.

Dec 12, 2010 | ViewSonic Optiquest Q19wb LCD Monitor

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 ..

May 03, 2010 | ViewSonic OptiQuest Monitor

1 Answer

ViewSonic Optiquest Q7b 17" LCD Monitor has a fuzzy picture


LCD monitor needs to be fed with native resolution from the PC video out, this monitor native resolution is 1280x1024 @60Hz, try that setting to see if it helps before opening up the monitor to look for failed components.

Mar 29, 2010 | ViewSonic Optiquest Q7b Flat panel TFT 17"...

1 Answer

Optiquest q9 turns off


read the solution I have wrote on th Q7
display goes blank after few second
the fix is about 5 $ the supply is almost dead

Jan 18, 2009 | ViewSonic OptiQuest Monitor

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