I know. They had already replaced the ends on all of the cables in the wall. And I got the tech to check the signal coming from that. Turned out there was a bad amp upline. However, my problem didn't go away once they fixed it. The good news is that the Tivo update seems to have fixed the problem. I escalated my cable card issue to ComcastCares, but it didn't do any good. They still required a tech to come out and wouldn't activate the cable card over the phone.