No sound. No sound. I turned the TV on and there is no sound. I tried to change the sound modes on

Question

No sound. I turned the TV on and there is no sound. I tried to change the sound modes on the menu but nothing helped. I noticed that you suggested to someone else to check the sound IC. I am assuming you mean integrated circuit...how is the average Jane supposed to know how to do that? This TV is a real piece. We have already had to have the power supply??? whatever replaced because it wouldn't turn on at all a couple of months after we got it. Please help!