I had a S03 error when trying to update programming. Reading through some posts I deleted my thumbs up/down (even though I never used this). After hitting thumbs down 3 times and enter, the screen stayed frozen with a message that it could take an hour. After about 5 minutes the Tivo rebooted by itself and then stayed at 'powering up' for a few minutes, then went black. I tried unplugging and replugging but screen remained black. The green light turns on and I can hear the hard drive spinning for about 10 minutes.