Sound will go to loud static noise, but picture is fine

42" Vizio TV flickering strobing easy way to repair VW42L ...

? 2:49
https://www.youtube.com/watch?v=Qba7_YHnXwM
Dec 2, 2013 - Uploaded by ozzysslayer
42" Vizio TV flickering strobing easy way to repair VW42L HDTV10A LCD TV ... EASY How to Fix Samsung LCD TV Flashing Flickering Screen!Missing: vp422hdtv10a ‎snow

Vizio Replacement Boards - ecoustics.com

www.ecoustics.com > ... > Plasma & LCD TV Forum

Apr 15, 2009 - I have a vizio p42hdtv10A that just went into a black screen. .... I have a Vizio VP422 HDTV10A that will not stay on or show a picture. I removed ... Vizio vp422 hdtv10a
Dec 20, 2011
Plasma & LCD TV Forum
May 13, 2011
More results from www.ecoustics.com

Based on what you have tried if a buzz or loud static via the speakers you have something wrong in the audio output circuit of the set--problem here is that circuit may be part of the Main board that processes all signal---a look inside---following the speaker leads back would lead you to that board.

A simple thing to do to narrow it a little (you may have done this) is with sound all the way off put your ear to the internal speaker--hear anything at all like a deep hum?

Depending on age of set and cost of the board likely bad it may or may not be a do it yourself repair.

SD TECH

Sounds like your lamp or the power supply blew. If there is no sound either, it could be the power supply.

Take the back off and try to isolate where the sound is coming from.

You should check your home wiring and grounding. Also be aware of anything that has recently been turned on when this happens. Anyone using a microvwave, cell phone, or other appliance that might be causing the interference.

Most likely what happened is one of the capacitors went bad. When a capacitors goes bad it produces a popping sound. This could be an easy and cheap fix if you find the bad capacitor or capacitors. The bad capacitor will have a bulging top most likely on the power board but could be anywhere.

You need an Vizio authorized TV repair guy to check out the problem for you.
Solutiondoct

With all the listed sets,itis most likely the y-drive(sus) board.The only problem is that this board usually fails when the horz.buffer ic's fail,which is usually part of the plasma display.This was a semi-common problem with this set.The best bet is to find a new set,since the parts alone will exceed the cost of a new one.Pioneer or nec seem to be the most reliable that i have seen.

ysus pcb that supplies voltage to the panel is faulty

sounds like it may be a software upgrade