Ok I know Sat installs Direct but, maybe he or some one can help. My dad has Dish hooked up and it has one receiver that runs 2 tvs and another that runs the other 2 tvs, the installer said that the remotes use radio frequency and all work fine but one, it is a tv that is the secondary but its not 75feet from the receiver. called dish and they cant tell us why it only works when it wants to. Any help would be great.