Question about Vizio VW42LF 42 in. LCD HDTV

1 Answer

Sound but no picture

Didn't get sound nor picture. Replaced mainboard and now when I turn it on I get sound and the backlight and picture (blue screen) flashes briefly before going black again. When I turn it off then back on the same thing happens.

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  • Vizio Master
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After replacing the main board, a software update will be necessary in most cases. Check it.

Posted on Jan 08, 2013

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6 Suggested Answers

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Posted on Jan 02, 2017

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SOURCE: Vizio 42", have picture for about 5 mins then screen goes black.

also check the power cord wire coming from the back of the tv is loose from the tv side or perfect.

Posted on Oct 26, 2008

  • 92 Answers

SOURCE: Plasma does stay powered on

Your sustainer board is probably bad. You need to get the Y & Z sustainer boards replace then it should be okay.

Posted on Feb 09, 2009

phongnv
  • 56 Answers

SOURCE: vizio p42 very dark screen backlight off

There is no back light in plasma TV, Base on the description, the Z Sustainer board is bad. Replace the board will fix the problem.

Posted on Feb 17, 2009

  • 19 Answers

SOURCE: How to reset tv. Have sound but black screen

LCD's use a colorful crystal see through display which only visible when light is shining through it. if you have sound and no picture it's always a faulty PSU. Very easy to change out actually.

Posted on Mar 27, 2010

budmrtn
  • 11361 Answers

SOURCE: 26" LCT HDTV Backlight Problem

It can be that the inverter is not getting the 24vdc fromt he power supply module, check for that first, you can check it at either the power supply termninals or at the inverter board. Look to see if the power supply has any leaking/bulging top caps. Modules are easy to replace, fixing it down to component level is not so easy unless you have proper tools an electronics knowledges.

Power supply and Inverter bd: http://www.shopjimmy.com/catalogsearch/result/?q=Vizio+VA26L+

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http://en.wikipedia.org/wiki/Capacitor_plague
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Posted on Jun 14, 2010

Testimonial: "Thanks. I swapped out the inverter board for one that I know works, but still have the same proble. I'll look for indications of a bad power supply for the backlight."

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Hi my name is Roety,
I can help you with your issue ,
Without a model number, I do work on sony LCDs.
The audio is on the mainboard. You need the mainboard replaced.
Reboot every device by unplugging the AC power , if the sound still cuts off replace the mainboard
 
 
 
If I have helped you with your issue please click accept.
If you have more questions you can still respond
I will reply asap
Thanks
Eric

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ya kunle bawo ni ? are u a technician? well do this .check your power moudle outputs if all are ok(no voltage drop, no fluctuation & no burst or swolling electrolytic capacitor). disconnet your backlight inverter supply from the power moudle.plug your speaker & antenal firmly. plug your tv & power on, scrol tru your channels, if sound. your backlight inverter is bad. if all still remains dead ur analog/digital converter(mianboard) is bad
thanks. o seun.

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