I just upgraded my old receiver with a brand new 625, I have a dish 500 with dual lnbfs going into switch 21 with one line going into the house that connects to a splitter in the back of the receiver. I keep getting a switch error, so only one tuner is working. I dont have a second tv hooked up yet, could that be the reason? Also if i recorded one show and try to watch another, it wont do it, because of the switch problem, and the picture in picture mode wont work, it just says aquraing satellite signal, witch it never gets. so it has to be the switch. I had no problems with my old single tuner receiver. Any ideas?