When we ran the auto channel setup on our 2001 (SST4191) Sylvania TV all channels over 69 disappeared even though we had been receiving some of them (77 was one). We live in a remote area, but they were coming in very clearly. We also had this happen on another TV that is only a few months old (also analog). Are the channels above 69 digital? If not how do we recapture the channels between 69 and 100, or at least 77? We've tried manually resetting them.