I have had this Roku for two years and never had a problem. Now all of the sudden, I get the home screen with all my channels, the channels open, but when I choose a video or movie, no picture. All the sound. Even the notifications are popping up in the corners (eg Ad 1 of 2, next...., etc). I have unplugged it, looked threateningly at it, no change. Anybody able to help?
Other people are reporting problems with OAN. You can use this forum's search function to find them.
Otherwise, when having problems like this, please report which channel app you are having problems with. Each channel creates, provides, and maintains its own app to stream their channel to the Roku, as well as deciding and programming its features, including geographical areas of operation. Roku only provides the platform on which the 3rd party channel apps run. You should direct your questions and concerns to the channel. (Exceptions are the two channels provided by Roku, The Roku Channel and Roku Media Player. For these you should contact Roku.)
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I am having this problem too, but it is on ALL ROKU channels -- Amazon Prime, Netflix, YouTube, PBS, etc. I am convinced the problem is the ROKU TV, not the channel, because I can watch Prime, Netflix, etc. on other devices that don't use the ROKU. I can also watch TV with no problem.