FWIW it just sounds like a bad cable card to IMHO. If TiVo is getting basic cable it's probably working fine. It's possible that the card needs to be re-initialized (re-hit) but it's more likely a bad card. Did the installer try other cable cards? There are many, many stories of installers trying as many as a dozen cable cards before finding one that worked. Seems like they think it has something to do with the owner's equipment (TiVo, flat-panel TV or whatever) and just take the cards that didn't work back to the office and toss them in a bin for someone else to try. When we had Comcast we lucked out on the last install because everything worked but prior to that one they had to try three cards before one would work. The tech acknowledged that he usually had to try a "few to get a good one". I'd call Comcast and have them try re-hitting the card but if that doesn't work they need to come back out . Tell them to be sure that the tech has several cable cards in his or her truck to try out. Best of luck and keep us posted!