Newbie here, but not new to Dish Network. I already have a 301 receiver but until this morning I had a 300 dish connected to it. I purchased a DishPro 500 LNB and 20" dish off some sleezebag on Ebay (haven't left her a negative YET, but intend to). Anyway, I got the new dish up and then when I went to the point signal screen and did the checkswitch thing, all 4 xxxx's came up at the end for everything. Checked connections, same thing. Can the LNB be defective? I'm not the only Ebayer this person who screwed over. Thanks! (I have another question coming up too).