I have two hr21s. So I have 4 lines coming in at my main TV. Over the past month I have been getting lots of 771s but then things would clear up. Yesterday, nothing recorded and when I went to live TV pretty much all channels would not come in. I went back and forth to both receivers and found I could get some channels on each receiver but not all on both. I tested signal strength and found that each receiver seemed to have a dead sat input (all zeros on signal check). So I took the two working lines and moved them to one receiver and that seems to help, but still I get 771s despite signal strength being good. I am suspecting a bad multi-switch so I called service. The weather is perfect here btw. Bad news, no one can get out her until October 20th. The service center said it was Hurricane Ike problems (I live in Michigan). Anyway, I set the appointment, but I am thinking of going to Radio Shack and buying a multi-switch to give that a shot. My dish is mounted rock solid and signal is good on the two working lines so my best guess is the multi-switch is flakey. Two questions - One, is swapping out the multi-switch worth a shot? Two, 3 weeks for a service call is a bit ridiculous right?