Vizio makes loud static noise, picture goes fuzzy.

Samsung LCD TV with no video and high pitched sound - Digital TV ...

www.tomsguide.com/forum/54120-4-samsung-video-high-pitched-sound

Jan 7, 2010 - 26 posts - ‎15 authors
Hi, I have a Samsung LN40A550 LCD TV which I have had for just over a year. ... I was watching TV yesterday and all of a sudden the picture went all. ... started makinga very high pitched buzzing sound with no picuture coming on. We did have a bunch of green vertical lines, but now just a black screen.

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Sounds like the power supply board has gone out. It can probably be replaced, but only by someone qualified to do so.

The problem might be in the T-Con controller - try this solution: http://www.coppelltvrepair.com/p/539/repair-service-for-auo-t400hw01-v4-40to2-c02-40t02-c02-lcd-timing-controller-t-con-causing-bad-tv-picture

It sound like you may have sound processor problem which is part of the main board, I would also look at the 12vdc from power supply to make sure it is clean DC.
Parts: http://www.shopjimmy.com/catalogsearch/result/?q=l37hdtv10a

http://en.wikipedia.org/wiki/Capacitor_plague

Hello

This is a warranty issue. Either take the TV back to SAM's club or call Vizio for a warranty repair.

Call 1-800-Samsung to set up a warranty service call. They will repair it in your home if they send a Samsung Field Engineer. You probably have a bad Main bd.

What sources make it happen or which do not? All buzzing = something in the amplifier end. is it from all speakers or just one?
One external source= RCA cables not grounded. Reconnect them tightly with a twisting motion to wipe off oxidation.

This could cause by the power supply or the mainboard.

- If the LED stay Green when you turn on the TV. But you can not turn it off, in this case the main board has failed. Replace the mainboard will fix the problem.

- If the LED light always stay at Orange, you can not turn on of off. In this case the mainboard also has failed.

- If you turn on the TV you will hear the power supply click on the LED is green then it click off the light turn Orange. In this case the power supply has failed.

Which boards did the repair shop replace?

Hope this will help.

this can happen with the flyback transformer's brightness which can be adjusted , also the power transformer can make humming or buzzing sounds which can't be adjusted , also this can happen with the picture tube or the CRT board failing , and sometimes chips with heat sinks or the IC's themselfs

i have vizio that turn on, but no picture, and the invarter light is on and it won`t turn off.