I posted in another thread about a one time situation I was getting with 775 error on my HS17/4k client setup, with an additional non 4k wired client. I called D* to schedule a tech visit the day after it happened, but the situation cleared up and hadn't recurred in about a week. I kept my appointment anyways to see what the tech might do. He said my line to the dish was fine, but that he was going to give it a "boost." What he apparently ended up doing was installing a DECA just outside the HS17. It is a small black unit with "Connected Home Adapter DCAU1R0-01" label. So now my cable from the dish goes into a SWM splitter. There is a cable that runs to the SAT IN on the HS17, one to my 4k client box, and then one to the DECA. The DECA is connected via both USB to (to power it?) and CAT5 to the HS17. My picture comes in fine and I have not gotten the 775 message. But as I mentioned I only got it one night in what appears to have been an isolated incident. One issue I did notice is my DirectTV app can no longer connect or register to my DVR now, whereas it worked fine before. Does what he did make any sense at all, or did he just add multiple wires/cables and hardware to my setup for no reason? Maybe the internal DECA on the HS17 is weak/flaky and as a precaution they are now adding external ones. Or more likely I got a tech who doesn't know what he is doing?