Woke up this morning and turned on the 921 and got the "acquire sat signal screen" Ran a check switch, signal was on input 2 and nothing on 1. Swapped the cables, the same thing happened, no signal on input 1, once again input 2 had a signal. After that, now I can't even get any screen to come up. Went and got my 811, its dead on these inputs with no signal. My 501 has no signal thats upstairs in my kids room, seemed the Dish is out of align. I put on a new DP 34 switch.......still nothing Put on a new LNB........still nothing Hooked my original DP 34 up and put the old LNB back on, now I have a signal again. Re-tweaked my dish, everything is working now. It almost seems to me somehow my 921 screwed my switch/LNB's to where I lost my signal. After them setting unhooked and hooking them back up, they were fine. My 921 is still dead, I have good signal strength now and my 501 and 811 are working. I'm getting a good signal off the 2 leads my 921 were hooked to, I tested them with my 811. I find it hard to believe my Dish lost alignment, we had no winds, the day before, the CSR and I went over my signal strengths on different transponders when I activated it. Dish is RAing me another 921.....I'm probably their fist one. One more thing I would like add is after activating it, I never really turned it off the rest of the day, it wasn't till I went to bed I turned it off. Then the next morning is when I had the problem, when I turned it back on.