For about a month now, I have been receiving HD signal from my OTA mounted in my attic. Tonight, only two channels are working. Channels 4.x (IND) and 7.x (PBS). Anything above 12 has stopped working. Nothing has changed in my configuration. Tomorrow I am going to reset my DTV HD receiver (samsung TS360) hoping that may clear the signal. When I do a signal strenght test, the signal bounces between 45% and 67% but the channels will not show. Before I do my normal tear things down and start over, any insight as to what would cause this is appreciated.