I have a Dish 500 system with a standard receiver and a 510 PVR receiver. I have a Twin LNBF on the dish. We have had 8 service calls and have made about a million technical support phone calls. Nobody can fix this problem. Included in the service calls have been moving and repositioning/realigning the dish and replacing the LNBF on the dish, twice. The problem that we're having is that the 510 will sometimes lose a satellite. It will only receive either the 110 or the 119. (in the system setup it says "warning - only one satellite connected) or something. Nothing will fix this problem (ie. rebooting, resetting, removing smart card, check switch). However, if we hook the standard dish receiver up to the same cable/TV, it receives both satellites. Since we have 2 receivers, we have 2 cables coming into the house. If we switch the cable going to the 510, it will then get the other satellite. For example, right now it gets sat. 110, but not 119. If I switch the cables at the place they come into our house, the 510 will get 119 but not 110. The standard dish receiver doesnt care which cable is hooked up, it always gets both satellites. So finally, they sent me a new 510 receiver, which turned out not to be the solution as the problem is still occuring with the new receiver. The problem is not weather related either. Between me and the dish service guys, we seemed to have tried about everything, and DishNetwork won't spring for a completely new installation which is what really needs to happen. Does anyone have any idea what else this could be? This problem has been going on for about 2-3 months now and Im about to quit the dish as much as I like the PVR and programming. THANKS!!