Re: JVC service or questions

I HAVE A 27" JVC TV MODEL AV-2750S ITS APPROX.15 YEARS OLD.THE SPEAKERS ARE MOUNTED ON THE SIDE. DURING LOW TO MEDIUM VOLUME SOUND CUTS OUT TO LOWER VOLUME AND THEN SUDDENLY COMES BACK. I THINK BOTH SPEAKERS ARE AFFECTED AT THE SAME TIME. IF I TURN UP THE VOLUME ALL THE WAY THE SPEAKER(S) COME BACK ON. I THINK ITS NOT THE SPEAKER THEMSELVES BUT MAYBE SOMETHING TO DO WITH A VOLUME CONTROL THING INSIDE TV. I HAVE ALSO NOTICED POSSIBLY ONLY SOME CHANNELS ARE AFFECTED BY THIS DIFFERENCE IN VOLUME. I WOULD LIKE TO REPAIR THIS MYSELF SINCE BRINGING IT IN FOR SERVICE WOULD INVOLVE LIFTING A HEAVY TV. CAN YOU HELP. WHAT DO YOU THINK IS WRONG? IS THE "PART" EXPENSIVE? COULD I DO IT MYSELF? WHERE CAN I ORDER PART FROM? THANKS.

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