I live in central Kentucky and got my 811 on January 15. I did the digital scan and was able to receive the local CBS (78%-82%), local ABC (high 60's and low 70's, but perfect picture), local PAX (in the 80's) and about six different digital PBS channels (most in the mid and high 80's). I was able to watch all of them perfectly for about six weeks. Then, one day the digital ABC and PBS were gone. I redid the scan, but they aren't found anymore. When I do the manual add DTV and put it on channel 40 (the local ABC), I get no signal at all. How can I go from 70% for ABC and 80% for PBS to absolutely nothing? It's been two weeks now and I still can't find them.