If the noise is coming in through the onboard tuner then repair may the only option. If you have a DVD or VCR and can connect the line level inputs (look like stereo connections) then do so and use that input, if the sound persists there then it is likely the audio circuitry - also a repair item. Bypassing the TV sound system involves connecting your cable box, DVD or VCR (using the tuner from that unit select channels) audio output to a stereo system and then the TV becomes a big monitor (picture only)
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If the noise is coming in through the onboard tuner then repair may the only option. If you have a DVD or VCR and can connect the line level inputs (look like stereo connections) then do so and use that input, if the sound persists there then it is likely the audio circuitry - also a repair item.
Bypassing the TV sound system involves connecting your cable box, DVD or VCR (using the tuner from that unit select channels) audio output to a stereo system and then the TV becomes a big monitor (picture only)