I live in the Montgomery County, MD and Comcast has somehow made it so my Series 2DT with a cable box can't get chanells anymore. At first, there was a white screen with a message from Comcast saying the chanels in the lineup (1-99) have switiched to an all digital format, and I needed a new box. Oddly, I could get my movies channels (in the 300's) on the box. I called customer support, and they did a remote reset, and that set all the screens to black/no signal. Called for a support guy to come in, we hooked the cable box into the TV, he reset it again, and the picture came back. I put the TiVo back into the system, and get the black/no signal picture. This doens't seem to have affected my HD Tivo, with the built in cable card. I did try to do the channel line-up set up again, and it got stuck telling me there was a temporary line up, but it wasnt the right one, and it failed to detect my cable box. The set up is cable outlet, spiltter 1: Coaxial cable into the Tivo, 2: Coaxial cable into the cable box, RCA cable out of the cable box, into the Tivo, Coaxial cable out of the tivo, into the TV. (The TV has no other inputs.) Suggestions?