I bought a new HD tv last year. Also, I used an xbox 360 with it. For a while the sound played well. Then all of the sudden it stopped working. I didn't touch anything when this happened. I've tried messing around with the cables and such and even bought new cables and those don't work. What should I do?

the problem may be the t.v, the cables, or the xbox 360... the same thing happened to me and we found out it was the brand new t.v. but the cables might not be plugged in strongly or correctly.. or the av cable slot on your 360 maybe having problems... but if it's the t.v make sure you r on the right channel or have the right settings.. or didnt turn the audio down on the game or muted the t.v

call an electrician

You might have an ac cable unplugged