Sorry to put this here, but I've had this problem posted in the Canadian satellite forum for a month with no help. I'm working with with the Bell equivalent of a 211k receiver (a 6131) on a Dish 500 with the two dual output LNBs. I had to disconnect the cable from the dish to move it out of the way for a couple weeks. When I reconnected it, I had no signal. I swapped the cable with my antenna and it still worked, so it's not a cable issue. I tried two other SW21 switches I had, still nothing. I bought two new LNBs, still nothing. I tried to reset everything by running a check switch with the cable disconnected, accepting the results of not finding any satellites, unplugging it, recounting the cable, restarting, and running the check switch again. Again, nothing, and it won't even recognize a switch being connected. I've tried connecting each LNB individually to get a signal, and still nothing. Is there anything I haven't tried? I'm at a loss here.