I just upgraded my Roku 4 (working fine) with a Roku Ultra. The Ultra is having problems syncing(?) when connected thru the 975. About every 10 seconds, the screen goes black, flashes, and then the picture comes back. I've tried 3 different cables, different options in the 975, different port on the 975, different resolutions on the Ultra, but the problem persists.

The Ultra works fine when connected directly to the TV.

Support has suggested that I power down all devices, unplug all cables, wait 5 minutes, and re-connect/re-power everything. I will try this asap, but wanted to see if anyone else is experiencing anything similar.