Our HD rebooted tonight. After it booted, I watched a different show with no problem. Then I went to finish the show that the reboot happened. The show did not have a position saved. I started at the beginning, jumped to the end, rewound back and started watching just before the reboot. It rebooted again when I hit the same spot. I went again and rewound to just after the problem and finished the show from there. So, bad hard drive? Anything to do besides replace it? It was an HD show. I would hope that even a horribly corrupted MPEG could not trigger a reboot.