My Pioneer DVD recordable S2 Tivo unit has always performed flawlessly. Now when I turn it on, I get the channel guide, can change channels via IR blaster and get sound from the cable channel I select. But I get no picture. Using Comcast digital signals. I have reset Tivo several times and nothing changed. Has onyone had a problem with being able to get tv channel sound and no video? Any solutions. I doubt unplugging/plugging is any different than using Tivo menu option. Will try that as last resort.