No when I got Genie upgrade I was converted to SWM from legacy on Zinwell 6x8, I already had 4 receivers and still have 4 before the switch, which is 9 tuners
Then I changed the HR24 downstairs and H24 upstairs, Other 2 receivers are on the same location HR44 upstairs and D12 downstairs, I also have mini client but it's not active,
Changing those first 2 receivers I mentioned is what caused the 776 message, There's also no IRD hooked up to PI but it's does have coax from outside line
presumably on the SWM 16, Although I did only saw the message on the HR44 not on the rest of the receivers
So I would think the issue is on the HR44 itself, and probably needs to be changed on the SWM port, That same line from the HR44 is coming from straight from dish initially, They probably changed it to the splitter or SWM when I did the upgrade.
Well, you can look at this yourself if you want, you have a SWM 16 like I do I would imagine, mounted outside (possibly inside) ...
You'll have 4 lines coming from the LNB now, feeding into the SWM16, more than likely that part is fine.
Then on the Out to the recvr side of things, you'll want to count the tuners on each side, there can only be 8 tuners on either side, this is where I'm wondering if your trouble is coming from.
I would look to see which one has the PI on it for starters. This needs to be a 29v inserter.
Now
I always use the line with the PI on it to feed a recvr in this type of situation. (don't know if this has anything to do with it, its just the way I do it.)
Now, try to determine what recvrs are on each side of the SWM 16 and count up the tuners involved and see where you stand.
Remember the Genie is 5, so you can have the Genie and a HR24 and a H24 on one side and thats it.
I don't know how many total recvrs/tuners your running, but if you have a total where you can have the Genie on one side by itself, thats the way I would do it.
It's up to you if you want to dig in and sort it out or wait for them to get there.
Any installers that want to advise on my theory, feel free to jump in.