39MF412B Magnavox TV high pitched noise when turned on.


Old 08-16-13, 09:04 PM
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39MF412B Magnavox TV high pitched noise when turned on.

As soon as I turn on my T.V a high pitched noise comes from the T.V. I am in no way a T.V man, I work on P.C and thought I could fix it but I have no idea what I am doing. I took the back panel off of the T.V and the noise comes from the brown, bigger of the two boards (Don't know if that helps or not) Any idea what the problem is?
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Old 08-16-13, 11:17 PM
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Welcome to the forums.

Is the TV working normally with that sound or is that high pitched noise all it does ?

The power supplies are high voltage oscillator circuits. A bad capacitor could cause an issue like that.

In the link below is the power supply board for you TV.
Magnavox 39MF412B TV Part BA21T0F0102 Power Supply Board | eBay

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