So I have charter cable (worcester Ma. listings) I think they did some sort of system update or something because after a service outage last week I can no longer tune the Qam channels regularly. Nesn, 103-3 is no prob. NBC 102-2 is 50:50....fox HD will no longer tune (102-2). THey all work fine on the HDTV w/ just the cable into the tv. Now i just get grey screen. The signal info says 100% signal on the channel...but it doesn't tune. I am not using cable cards, just the cable right into the tivo for unmapped qam THoughts? HELP!