Last night my wife and I were watching Son's of Anarchy, when all of a sudden, the screen pixelated, and then black screen. After about 30 seconds, a banner at the bottom of the screen indicated that it was 'searching for satellite signal'. It does not appear that any other channels were affected. Can someone provide me with some information on what may have caused this? The machine is a series 2 Tivo on DTV, model number I believe is 540140.