Question about LG 42PG20 42 in. Plasma HDTV

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Humming from back of tv

Hi, I just purchased a 42" plasma around 2 months ago and all of a sudden im hearing a loud humming coming from the back. the sound comes and goes but it mostly comes. It does go away for some time if i tap the back. what is this sound?

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  • Anonymous Apr 12, 2009

    just bought a 42" vizio plasma tv, and i got the annoying bzzz too, if i turn it off for a little while and yurn it back on, no bzzz, but after a short while, bzzz is back!!!! aaaahhhhhhhhhhhh, so annoying!!!

  • ninoamigo Apr 15, 2009

    lg please improve

  • Anonymous May 04, 2009

    Hi I have the same problem, starts buzzing after some time, switch off for a while and it fixes the problem but only temporarily. jscruggs420, specifically do you mean there is a problem with the power supply? how can I fix this is it a case of the capacitors failing?

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  • 36 Answers

Sounds like your powerboard, you can try a cheap fix by putting a small fan behind the tv on low and see if that helps. Also I would not settle for this and call in the warranty and get it fixed while you can.

Posted on Jan 18, 2009

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A common problem for these is bad capacitors in the power supply, Remove the back from your Tv and look at the power supply on the left hand side.

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Samsung states - A buzzing sound from your plasma TV is normal. It is caused by the electrical charges used to create the images on the screen. The buzzing, however, should not be so loud that you can hear it when the volume on the TV is set at normal levels.It is also important to determine the type of buzzing sound. A sound like a ground hum is completely normal. This buzzing can originate near the power cord connection or from the SMPS board position on the upper back of the TV. The buzz will be more audible as contrast increases on the screen, most notably when displaying an all white screen. If the buzzing sound is loud, you may have the Contrast set too high. Lower the contrast to reduce or eliminate the buzzing.You may also have loud buzzing if the rear of your Plasma TV is too close to a wall or other hard surface. Try moving your TV away from the wall until the buzzing is minimized. [1]
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