We have the same setup, 2017, new receivers from Direct, all dealer installed. Years of experience with Direct. I doubt that the problem is your location, could be but I doubt it.
Let's start with just one tv.
Turn on with the black remote.
Menu, select input, guess HDMI 1 but it could be 2 or 3.
Look for NO Signal
Turn on Direct Receiver with Gray Remote.
Turn on Direct Antenna. This may take 5- 10 minutes for it to find signal.
Open small door on right lower corner of Direct Receiver, in there you will see a small Red button, press, this will reset Receiver.
I'm sorry there is a very steep learning curve, but once you understand it is very simple and reliable.
Let me know how it goes.
For reasons that I will not discuss, my wife watches in motion Direct for thousands of miles, rain, mountains, trees without issue.
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