Ok. HD-500 and Terk HDTV 60 (save the jokes, it actually has worked great for me). I'm about 25 miles from the transmitters, and until 2 days ago, got excellent reception on NBC and ABC, and pretty good on Fox and CBS (some intermittent signal drop-out). I went away on vacation for two weeks, and turned off the power injector to the antenna. When I returned, if I turn on the power injector, I get no signal on any local digital station. If I leave it off, I get a signal, but it is weaker than I had before. CBS is ok, but with more drop-outs, and Fox is unwatchable. Again, the only thing I changed is turning off the power injector for two weeks, then turning it on again. Any thoughts?