Sorry, I didn't know whether to post this is the Series3 forum or the Help forum. I just had an M-card installed in the TiVo HD, but the installer did not write down the serial number on the card. I don't want to go pulling the card out unless need be. Can the serial number be found in the TiVo HD/cablecard diagnostics area? If so, where would I need to go specifically to find it? The reason I ask is that I am not receiving some of the premium channels, and when I call up RCN, I was hoping to be able to tell them the serial number (and hoping this is something they can fix over the phone, and not needing to send another installer).