Hi Joe
I understand how frustrating this is getting…and it amazes me the ProTools folks don't help!
I suggest you try to test your units with another ADAT equipped device at your location, maybe a friend or a shop can help you?
Consider that shipping anything back if not broken and/or not covered by warranty will cost you money. Testing where you are makes much more sense to me as that's what I'd do right away.
You could also test your Pro Tools rig configuration and hardware by loading amn oscillator preset on the Eventide and feed PT via ADAT, using an ADAT routing.
I
