I recently bought a 42 inch LG HDTV. The sound actually does work, just not when I'm watching tv. I have my PS3 hooked up to it in AV2 and sound works there, and yesterday night it was working with my cable, so why isn't it working now? I did the customer support option for audio and it said if I could hear the music (which I could) then it was an external problem and that I should consult the manual, but the manual doesn't help at all (typical). I'm thinking maybe its got something to do with my cable box? I have Cox Cable by the way. How can I fix this?