Two weeks ago I purchased a BEV 3150 (3120 system and a 3100 refurb) Everything was working fine for the first week then the refurb started acting up.It loses signal on most TPs then all of them then it works fine for a few minutes.I switched the cables on the LNB and no change.I switched reciever locations and more TPs were working on the refurb but not all of them.So is the reciever a piece of crap or it is something else? Help!!