TV keeps losing sound

Please try to check the secondary PSU second & sound board electrolytic capacitor with their ESR value too. More info on repair lcd tv, here is the site you must visit: www.lcd-television-repair.com . Hope this help.

I have run into similar problems on a few sets, and what it turned out to be in all honesty was a heatsink in the audio circuit that shifted and intermittantly touched the pcb. These were sharp brand as I recall. What I did was a major dissassembly which took half the day, and repair burnt spots beneath the bottom board, of three stacked circuit boards. Eventually you will lose sound completely and/or other functions if not corrected now. Good luck, Russmann.

Who manufactured the tv? I find this type of problem mainly in sharp and philips tv's.
Also need model number