I have a vizio E471VLE. It is making high pitched noise after about a minute of being turned on. Then horizontal lines replace picture, then goes black. Any ideas

Sounds like power supply board is bad

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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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Both of them are refusing to turn on, and make high-pitched sounds when plugged in and unplugged. More about : turning making high pitched ...Missing: ear ‎piercing

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We unplugged the unit and waited 15 - 20 seconds and plugged the unit back in, and it wouldn't ... He heard a loud high-pitched whining which led him to TV in my daughter's room. ... It only makes a humming sound now, no pictures at all.Missing: ear ‎piercing

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Jan 25, 2013 - 3 posts - ‎2 authors
Hello, I hear this constant high pitched noise, almost like ringing, but even ... pitch

Are you a decent do it yourselfer? It sounds like it is the capacitors. What happens is they get hot and expand (the top of the Capacitor). The top will be dome shaped and it will look like the top is splitting open. You can buy (about $1.50 ea.) the capacitors at your local electronics store (not Radio Shack they usually don't have a high enough amp).
You will need to take the back off and look at all of the capacitors to see which ones are bad. Usually it will be 2 or 3 of the larger ones but there could be more. Next you will need a soldering iron with a fine tip and some wicking material. How could are you at soldering and de-soldering? before I go on.
If you let me know the model # of your set I can be a little more detailed also.

The high pitch sound may be coming from the power supply module or from the backlight inverter boards.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums

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

Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.

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

try contacting Vizio @ [email protected]

the set probably has lots of bad solder connection on the flyback and in the horizontal deflection circuit.

Horizontal output transistor is shorted,caused by bad flyback
transformer.If you want to pursue the repair,please give the
service number off back......I will get part # s........T.

Rarely picture tube also shows the same symptom. High pitch sound is due to through deflection area LOT power supply is loaded. Compulsary horizontal output transister short. From your statement i think Lot puncture takes place. Change LOT and horizontal output transister and check tv is now working.