the past week or so in the middle of watching a pre-recorded show on my Tivo Quad Elite the picture goes black and the sound goes off. The Sony HDTV stays on, but I see the word "Denon" on the screen, the model of my AV receiver. Then, when I turn the tv off and on I notice that the show is still playing uninterrupted on the Tivo and everything is fine again. It has been happening about once per day, every day. I am guessing that it might be a bad HDMI cable, what do you think?