This has been a nightmare. We got our HD Tivo hooked up 1 1/2 weeks ago. We had the Comcast tech come out to put in the 2 cable cards. He got the first one working immediately, but couldn't get any video on the second card. Spent two hours at the house and then he promised me that it would take a few hours and when I got home from dinner, the video would be there. Well, still had no video. So, after being on hold for 1 1/2 hours total after getting disconnected 3 times, I finally was told to take out the second cable card and at least I would be able to watch live TV until they could bring me out a new second cable card. The next day, a different tech comes and he can't figure it out...can't get the 2nd cable card to work. Tried 3 and none would work. Another 2 1/2 hours. Meanwhile, we lose all video again. I'm out of town and my husband is having a fit. Get back in town and they make a third appt to come out the next day. This guy is supposed to be an expert on Tivo. He brought four cards with him, and they still couldn't get the second one paired. He was there for 3 hours...from 7 pm - 10 pm on a Saturday night. He promised a supervisor would come out the next day. Next day, supervisor doesn't show, but supposedly this guy is an expert on Tivo. Later find out that he's only done two Tivo's. He was supposed to come out with 10 cards. Only brought 6, and none of them worked. He was told by Comcast to try taking the one out of Cable Card 1, finding another one that worked in slot one, and then putting the good one in slot 2 to determine if it was a TIVO problem or not. Well, he took the good one out of slot one, couldn't find another one that worked in slot one (I find out they were all used) and puts the good one back in slot one, and it doesn't work now. Now, once again, we have no video!! I have lost all patience and I've spent another 3 hours with this tech. So, the next morning, they PROMISE a supervisor is coming out. She calls me in the morning and says that she is sending her TIVO expert and he's bringing an M card. He shows up (has only done one TIVO in the past) with only two M cards, and the first one doesn't work. Puts in the second one, and it also doesn't work. He goes outside and I'm fiddling with the different screens and I get video. But no premium channels. He promises (Yeh, right) that I will have my premium channels within 24 hours. I was just happy to have video. I had become very familiar with the different menus and had found that if I went to a channel and couldn't get it to come up, if I went back to the decoder menu, went to diagnose, and then Test Channels, it would usually work and I'd be able to get the channel on live TV. Well, the following morning, I still couldn't get premium channels and I went back to Test them, and all of a sudden I lost everything in Live TV. I called Comcast and gave them a piece of my mind, but they claimed it was an accessibility issue (whatever that means) and that they would send out an engineer on October 8th. I flipped out. I demanded to speak to someone in dispatch, because you don't need to be an expert to give them the host ID, and the data numbers. There is absolutely nothing an "expert" can do in my house that I can't do....they need an "expert" at the home office to pair these cards correctly. He REFUSED to let me speak to dispatch, claiming that only techs can talk to them. I told him I was canceling my service and hung up. Later, found out that when I pulled the plug on the TIVO and restarted it, I got my video back. And even stranger, found out that during the time that my TIVO had no video, several shows recorded and they were there and viewable when my video came back. When I had lost video, I couldn't even watch anything on my Now Playing List and the TIVO central screen had a gray background....not the pretty colors that are normally there. I was messing with HBO channels and lost video again, but when I unplugged the TIVO and ran guided setup, got them back. After this long winded story...sorry...I'm wondering if this is a TIVO or a Comcast issue. I'm wondering how I could have the ability to see shows on my Now Playing List that were recorded when I didn't have any video. I'm still having a premium show issue that I know is a Comcast issue, but I want to figure out why I'm having these other issues. For instance, we can go to a channel, we have a gray screen, and then have to go into the cable card menu and lock it in before we can go back and watch it. And why do we sometimes lose all video, and can later get it back by restarting TIVO? HELP!!