If you have what looks like a splitter close to the ground block, it is actually a diplexer. There should be three cables connected to it, "Sat", "UHF", and "In/Out". If you have one there, then you also have one behind the receiver, (they have to be used in pairs). All you need to do is flip the "In/Out" and "UHF" by the ground block only. This will make TV2, TV1 and vice versa.