I use Roku streaming sticks on all my Vizio TV's. Now the TV's suddendly started having black screens, but you can still hear the show. This has occurred on several apps and both of my TV's. If I don't use the streaming stick and just use the same apps already on the TV, there is no issue. I like the Roku operating system better than the Smartwatch that come on the TV, which is why I have the streaming sticks. This is obviously a Roku issue. How do I fix it/
