I find a channel I want to watch. I enter the FR (Ku usually) into the Qauli TV and get no signal or an intermittent one that won't lock or scan. I unhook the LNB from the splitter and switch and go direct into the receiver and boom, I've got a 71% signal, it locks and the reception is great. What I don't understand is once I get the signal locked and scanned I re hook the LNB through the splitter, switch and back into the receiver and everything is fine. This happens on C band every now and then but is an everyday occurrence on Ku. I have 8 PBS channels stored on the Ku side and don't have any problems when I want to watch them. I have installed new splitters and switch within the last year and everything was fine until about 2 weeks ago. Does any one have any ideas why this is happening?