Question about LG 30FZ4D TV

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Sound problem every now and then my tv emmits a high pitch hum. it is low in volume and will last for a few minutes and then vanish. its occurance is very ramdon, nothing for a few weeks then constant for a few days. it's not coming out of the speakers but instead from the back of the unit. it's a lg 30fz4d. thanks.

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  • scott zymkowitz May 23, 2007

    it's not so much a hiss as it is a mmmmmmmmm. i haven't noticed any smell associated with it but the tv is located in our basement which could contribute to the dust and humidity.

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Is it a hissing sound ? If it is a hissing sound and you can smell ionized air (ozone) then there may be some high voltage leaks (corona discharge) in the High voltage supply coming from the flyback transformer. This happens when there is a path to ground because of dirt dust or spider web, or your surrounding is humid.

Posted on May 22, 2007

  • Michael Ifurung May 23, 2007

    One of the source of hum (60hz) vibration are coils and transformer core.

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