Question about LG 42LC7D-UB Television

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LG TV Making Bad Noise

Starting yesterday our LG 42LC7D tv is making a horrible noise. We can hear nothing but the noise no programming audio at all. The noise reminds us of a plastic propeller gone amuck. There are no special sound system installed just the speakers that come with the TV.

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I have the same problem with the sound of my 42LC46. How did you fix yours?

Posted on Nov 07, 2008

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Have u tryed new cables for sound 1st

Posted on Feb 03, 2008

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Free tv repair advice


The noise you hear must be from its back-light inverter board. The ferrite core in the inverter transformer may make a high whistling noise and will be annoying. Contact any technician. It can be stopped by gluing. But is a skilled work.

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1 Answer

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Check to make sure you have the right input selected for the input that ou have plugged into.

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It may not be the fans if this model uses a color wheel--fans can be cleaned with air to remove all dirt or dust(rest of set as well for that matter)

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1- check all the cables that are hooked up to the TV 2- try to get audio to and external speakers or home theater (to check the sound card). 3- if the step # 2 don't work either you have a bad sound board on your TV. 4- opn the TV try t get the part # of the board, and replace it

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1 Answer

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Most likely the noises are from the plastic cabinet expanding and contracting.

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