My daughter was watching TV, hit an unknown button on the remote and now there is no sound. The picture and everything is great. I reset the set to the factory default and reprogrammed everything. I hit the mute button and see that is not the problem. I turned the volume up and down. I unplugged the set and plugged it back in and still no sound. I think I tried just about every button to no avail. If anyone can help me with this, I'd appreciate it greatly and send you some great karma lol.