A have a 921 and 510 hooked up to a Superdish with a DP34 Switch. Over the last few days I have been losing my Dish locals from the 121 location. This is true for both receivers. The signal strength on 110 and 119 are both over 110. I am getting a lock on 121 even numbered transponders with strenth between 70 and 80. The odd numbered transponders do not lock at jump around between 0 and 70+. The check switch results show everything to be fine but the screen on the 510 only shows the receipt of even numbered transponders. The problem I have is that this condition comes and goes. I'm afraid that when the tech gets here everything will be working fine. Does anyone have any idea whether this is likely a bad LNB, switch, or cable moisture. I checked the ends of the cable but didn't see any sign of moisture. The weather has been warm (by Wisconsin standards) and sunny.