I've had a Dish 500(119/110) and an older dish pointed at 61.5 using a SW21 leading to a 6000 receiver for over two years with no problems. A few days ago the signal on 119 dropped down into the forties then 0. I've rebooted and disconnected the input at the back of the receiver and I've run the check switch several times. Sometimes it recognizes all 3 satellites, sometimes 2, sometimes only 110. Even when it recognizes all 3 I still get 0 for signal strength for 119. Thanks for any suggestions.