Mine is doing the same thing. It has never been plugged into the Tv but it thinks it is for some reason. It has always been plugged into the wall. It’s extremely frustrating as this is all we use for television services.
If you still unable to resolve the issue, please send me a PM (private message) with your Roku account email address, and include the serial number of the Roku device from Settings>System>About along with a summary of the issue you are experiencing. I'll be able to assist you further from there.