Advertisements I've just had the same problem for the first time. TiVoHD with no mods, installed about 2 months, CC installed about 6 weeks ago 9.2a-01-2-652 multicast CC component native Comcast cable (in Arlington, VA) I initially had the ESPNHD/ESPN2HD problem about a week ago - ESPNHD worked, ESPN2HD was black, but all other channels that I tried were working. Later, ESPN2HD was working again. Then several days later, I noticed other HD channels missing, but non-HD still looked fine. Then today, I lost all non-HD channels and the only channels that worked were the local HD channels. I called Comcast and while I was on the phone I was going through the CC diagnostics menus and got the black background behind the menus and then all channels were gone. I then rebooted and after the "few more minutes" screen came up, it froze. Stayed there for almost 40 minutes. I unplugged the box and after it rebooted everything works. When I was in the diagnostic menus, both cards had 100 for signal strength and appeared to be tuning properly. SNR was about 36dB for both. But when I tried to test channels, I got "No Channels Available." Since my problem appeared to occur in phases over about a week, I can't remember if there was a common denominator to the occurrence of problems (e.g., using menus, live TV button, network connection etc. as others have reported).