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High pitched noise when the T.V. is off. The noise only occurs when the T.V. is off and the red light is on.

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Agus Yustiara

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Such symptoms caused by damage or problems from the POWER regulator, comes from the transformer noise. usually caused by too high output voltage over 125 Volts. and is caused by other parts in the power regulator has been damaged or weakened, for example. is elco on the part of regulators. like to elco 100uf/50Volt size, 220/50 Volt. you can replace it, here Otocoupler in the regulator.

Posted on Aug 31, 2010

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The problem is with its backlight inverter board. there are some step-up transformeres [small ones] fitted on board. If any one's core bacome loose this fault will occur. Just open the TV and listen to which one makes hi-pitch noise. Replace it, if you can buy it from the electronic market at your town. In most cases, the inverter board needs replacement.
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