have Charter as my Cable provider (Fort Worth, TX). I have one HD channel that has no Audio or Video. This channel is channel 760 which is CNNHD. The analog version (Ch 36) plays fine. I have two series3 TiVo's and this channel acts the same on both units and all 4 cable cards. After you select channel 760 and no audio or video is displayed I go into the cable card menu and select the SA Cable Card CP screen and the Power Key Status shows "Not Ready-Waiting for EUT". Sometimes this status may read "Not Ready-Waiting for Time". The cable card(s) will in a matter of minutes reset them selves and all is fine until I go back and select channel 760 again, and it again upsets the cable card. Also if I go to the Test Channel display, The display will say "No channels available". Again after a few minutes (usually less than 4-5 minutes) the card apparently resets its self and all is normal. One other data point - when the screen is black (no audio or video on channel 760) I can record the channel and it plays back with audio and Video like there was no problem. Also If I press pause and let the buffer fill for a few minutes, I then press Play and I again have Audio & Video until it catches up with the current playback time. I've talked to TiVo & Charter and no one has a clue as to the problem. My son has a Scienticic Atlanta 8300HD DVR and he has no problem with channel 760 (CNNHD). If there is anyone in the Fort Worth area with Charter as their provider I would appriciate if they would let me know if their TiVo is affected. I can't believe I have 4 bad Cable Cards or two bad TiVo series3 with 4 bad card slots. Again only channel 760 (CNNHD) is bad all other channels HD, Analog or Digital work fine.