Well, I sent the tech off because he was an idiot. ("Hi... I've never done this before so I need to call someone to walk me through it.") He brought two cards: an M-card and an S-card. He kept telling me I needed both and refused to listen to me so I got fed up and told him I'd take care of it. This was after he called and gave Comcast the info. they needed. (He gave them the S/N, not the CableCard ID number. Is that right?) In any event nothing is happening: no channels are being downloaded or anything. In the CableCard Diagnostic menu I have this listed: Tuner: 0 Current Tuning Status: Not Tuned. General Tune Error. Does this mean Comcast isn't sending a signal to the card? The card looks brand spanking new so I don't think it's a card issue.