Feel free to post back with Roku model number (Settings/System/About), your router model number, and you ISP (internet service provider).
Also include some details about your issue as well as any error codes you are seeing on the screen.
Roku Community Streaming Expert
Just another Roku user... I am not a Roku employee.
Insignia RokuTV, Ultra 4660x, Premiere+ 3921, Express 4k+ 3941