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MY EMERSON TV MODEL #E320EM3 suddenly shut down and there is a Hi pitched screeching sound coming from it

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Your Emerson TV has a problem at its power supply if it is possible get it changed .

Posted on May 18, 2017

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Posted on Jan 02, 2017

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When I went to turn on my 20 month old 46in LCD LN46A500 it made the loudest high pitch screeching sound that no one would like to hear and the picture was black. The remote buttons and the TV control...


The power supply board have fail badly,all that high pitch screeching sound,it came from those high voltages gaps from those tranformers,that giving ur tv high voltages.The power supply board,that the board,where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

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The power source has failed - the sound is the source that autooscillates because even its protections have been damaged and are no longer capable of safely shut it down.
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Please Post your Make and Model number printed on Back of TV.

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are you talking about just the monitor of the computer as a whole? if you are talking about the computer then, there is something loose inside the case, which is causing the high pitched sound.

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1 Answer

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Sounds like you have a coil or transformer that needs resoldered. Possibly in the hi voltage circuit but sounds more like a transformer in the switch mode power supply...

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i recently had the same problem of a loud screeching noise. my unit was installed new in 1999 and has worked well up to this point.

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1 Answer

Sylvania Television shut down suddenly with a high pitch sound at the back


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Figure on replacing the flyback transformer.
Hope ya fix it!

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