Question about ViewSonic VX2835WM 28 inch LCD Monitor

1 Answer

Flat panel monitor won't turn on

No power no lights no sound

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  • Dan R Feb 19, 2012

    Power Supply Caps look OK. There are 2 - 470mico f on board next to p/s that have the tops raised slightly. I'll probably try replacing them, but they don't look to bad. Tried a different power cord.

  • Dan R Feb 21, 2012

    Thanks for the suggestion for low ESR. I'll make it a point to find some.

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  • Master
  • 1,684 Answers

The 2 470uf caps on the driver board can cause that type problem if they are bulging. Be sure to use low ESR caps for the repair. They will also need to be high temp and high ripple current. DO not use ones from Radio Shack, they can damage the board when they fail. Capacitors from Nichicon, United Chemicon, Rubycom and Panasonic are the best ones to use for this type repair. Just check the ratings.

Posted on Feb 20, 2012

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Posted on Jan 02, 2017

budmrtn
  • 11361 Answers

SOURCE: viewsonic optiquest flat panel lcd monitor power

Look for bad caps with bulging/leaking tops as shown here:
http://s807.photobucket.com/albums/yy352/budm/OPTIQUEST/Optiquest%20Q9B/

Very common problem in all LCD monitors as you can see in my albums.

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 pictures: 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.

Posted on Oct 27, 2011

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