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I have a thomson 28WH201S widescreen tv. after being on for a few hours it develops a high pitched whine which I usually get rid of by pulling on the arial lead or wedging something between the case and the arial plug

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This is usually caused by a leaky or noisy diode.
take set apart and make a funnel from a piece of paper, and try to pin point your sound. then try to carefully more or bend the part a lil till the problem goes away, if you cant get it to stop. then you will need to replace the part.

Posted on Apr 10, 2008

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I have a magnavox 37mf331d/37 that has developed a high pitched whine.the longer the tv is on the louder the whine.the tv is 5-6 yrs old


It's likely a capacitor associated with the power supply having gone bad.
It's obviously beyond your expertise to repair it yourself.
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The power supply on this model will whine when it is shorted or overloaded - the set would have to be brought in to determine exact cause.

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Had the same problem. It quit within about 5 seconds after turning the TV off. Replaced the color wheel and the whine is gone. The picture also looks brighter, which may be due to dusting the projection lens with lens-cleaning compressed air (from a can). The color wheel was about $100 from Samsung parts and it took less than 3 hours to replace. See http://www.jangro.com/a/2006/07/24/samsung-dlp-replace-color-wheel/ for good info, and be sure to read the cautions.

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