I have a Series 2 Tivo DVR Dual Tuner playing through a Sharp Acquos LC 46D62U. System working fine for a few months, but now, when playing directly from the Series 2, or when playing back recorded programs, the TV suddenly shuts off although the Tivo DVR appears to keep functioning. The TV can be turned on again but often goes off two or three times in a row. This problem does not seem to occur if signal goes directly from Comcast box to the TV. Am running out of ideas and slowly going nuts. Any ideas?