I have a Premier XL4 with Fios. Initially, everything was working fine. Then the issue with the HBO channels appeared over the summer, but that was quickly solved by calling Fios and pairing the card. But immediately after that, I lost the ability to watch a few HD channels - namely, TNT, NFL Network, one of my HBO channels, and most recently, AMC HD. When I go to any of those channels, I see a black screen and a message "Problem with the signal on this channel - trying again". This really has me baffled. I was hoping the problem would go away when we moved into our new house a month ago, but no such luck. So that tells me it isn't a problem with the coax or the feed since it has occurred in two separate locations. And I recently swapped in a new cable card but have the same problem. Of course, Verizon hasn't been helpful. I haven't tried contacting TiVo support - will do that next. Anybody have a similar problem? Any suggestions? Apologies if this particular issue has been discussed before.