I have a 722k and in the past 24 hours I've been having trouble with certain channels like HLN, TCM, BBCA, AMC, TRU, G4, ID. I was changing channels and the usual lost signal message popped up. There were a few times when the channel tuned in but I would see some pixelation. It's a nice day out with very little wind. Any idea what could be causing this or tests I could try before I give Dish a call? I took a look at the Dish and didn't see anything unusual. Thanks.