Any chance its the Ethernet/LAN connection? I also have a wired setup and usually the 'no connection' means no internet. I guess there's a chance its the Ethernet port on the Roku which would suck. I ask since I posted a separate thread seeking feedback about upgrading from the solid performing Roku 3 to an Ultra, though seeing this makes me wonder. Hope you get it resolved too
Roku 3 - Power User (film maker)
Mill Valley, CA
Jonathan
LG OLED55B7A, Roku 3, Marantz SR-6005, Panasonic Blu Ray, Definitive Studio Monitor 450 (L/R), Definitive LCR 2000 (center), Definitive 10" sub-woofer, Definitive surrounds.