thankfully this is not happening on all my channels, but it is something I'd like to resolve. The problem of no video (dark screen) happens when watching Series 6 of a tv show on Acorn channel on my TCL 55r625 Roku tv.
Across the top of my tv is a very thin white line, as if this is the only portion of video that can be seen, but I'm not sure. Audio works fine. When I try to access the TV settings by pressing the star button on the remote, only a slightly darker grey area pops out from the side, the settings are not visible. When viewing any other season of the same tv show on Acorn, both the video and the tv settings work as expected.
I thought it was an Acorn TV issue, but I have tested these episodes on another tv with a Roku stick on the same home network. They worked fine. I've asked family to view these episodes on their Roku device and Acorn and they have no problems.
I am able to see these Series 6 episodes when I access them using the Roku channel on the TCL, which would make it appear to be an Acorn issue, but there are no problems using Acorn to view them anywhere else.
I've done all the suggestions found for others who have video issues....unplug, uninstall channel, router restart, etc.
Thanks for any suggestions.