I've been having this problem since Saturday. I went to watch a programme on BBC 2 and there was no sound. I tried a few other channels and there was sound on some but not on others. I tried re-booting the TIVO box twice, but it made no difference either time. The problem still persists today, but we had never experienced it before Saturday and we've had the setup for years. Nothing has been changed at all. Can anyone please advise? I don't want to change the box if I can help it as there is a lot recorded on it that I haven't seen yet.