I have a Dish 500 with the pro plus twin lnbfs, but it has sat around for a while without being used. When I hook it up (single cable to a separator) to my 722 box, the check switch function works fine & shows the 119 bird in port #1, 110 in #2 & nothing in #3. But when I try to aim the dish, all I can get is 119...when I change to 110, it just says wrong satellite no matter how much I adjust the dish's aim. I'm figuring it must be a bad lnbf, otherwise I wouldn't think the check switch function would work. Does that sound like the right diagnosis to you? What else should I check? Tomorrow I'll try the 'covering one side' trick & see what that yields, but any advice would be appreciated. Thanks