Greetings, first off, I am in NE-zip 01001. Have 2 hd recievers, hr20-100 in the living room and h20-600 in the bedroom. Last 2 weeks or so, the hd locals on the h20 come and go, become very pixelated or gone. Does not happen on the hr20. SD locals are ok on the h20, as is all the other hd programming, just the hd locals. 2 recievers are fed from seperate lines off 5 lnb dish, no switches involved. Equally strange is that this primarily only happens in the evening. Any thoughts or opinions appreciated. Thanks in advance