Solved
Roku not displaying video
My roku does not show video even though i can still hear it and see the surrounding items such as the title and the cover photos for movies and shows, and yes i have checked to see if all my apps do ...
Couple more things to try:
Under "Settings > System > Advanced system Settings > Advanced display settings" does your Roku have an "Auto-adjust display refresh rate" item? If it is enabled, try disabling it.
Under "Settings > Display type" try setting this to your TV's actual resolution rather than "Auto detect".
