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Buzzing/Fizzing noise at the back of TV.

I have owned the jvc av-28r4sk for almost 3 years. There is a buzzing/fizzing sound coming from the back of the TV. It increases and decreases as the picture colour changes or as the picture transfers from scene to scene.Even with the sound at mute I can still hear the noise coming from the back of the TV. Can anyone help?

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  • sodafarl Jan 31, 2008

    Thanks. I have already had an engineer look at this, but could not offer a sloution. Should he not have spotted this fault after testing it for a few days. If this is the problem how much is it likely to cost to fix.

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  • Master
  • 4,402 Answers

Sounds like arcing from the high voltage transformer. i don't not recommend using it until you have it looked at.

Posted on Jan 30, 2008

  • Cary Farah
    Cary Farah Jan 31, 2008

    flyback and labor looking at about 200

  • Cary Farah
    Cary Farah Jan 31, 2008

    please mark the post solution as fixya

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2 Answers

Tv making loud buzzing noise


A common cause are failure of decopling capacitors in the audio section, and or the circuit board power distribution that feeds the audio board. Most of the capacitors are surface mount components. The standard fix is to start by changing the circuit boards that have the defective parts.

If the set is under warranty, call for warranty service. Out of warranty service is expensive for these TV sets.

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is the fizzing noise when the screen is really bright? if so the scan coils on the tube have come loose and need glueing down with nail varnish i know it sounds strange but it really works

if the fizzing is coming from the tv then you have whats called dry joints

dry-joint_small.jpg
and this will need to be resoldered or the tv will shut down if you can do this yourself then the best way to find them is to remove the back and turn the tv on its side turn on the tv and turn off the light you will be able to see the dry joints sparking on the baord


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