Here's my setup. I have an old AT9 side car dish which has been working fine for 6 1/2 years. Connected receivers are an HR23 and two H21s. A short time ago I added a swm8, deca modules to all receivers, and a hard wired CCK for internet. This was to update the system for deca based whole home service. The PI is cabled directly to the swm8 and the receivers and cck are cabled off of the PI via an 8 way splitter. All unused ports are terminated. Everything worked ok for a few days and then I got a 771 message for a couple of the hd channels. I unplugged the PI for a couple of minutes and after that the channels came up. The next day the same problem occurred. This time no amount of unplugging and restarting cleared the problem. The system test for the dvr shows errors found on both tuners for the odd (13v) transponders for the 103 bird. The same error shows up on both the H21s. A quick look at the dish showed no obvious external problems. Does anyone know of a simple test procedure that I can use to determine whether the problem is with the swm8 or the lnb? Thanks for any help.