I have a Roku 3 and several other Rokus in my home. All have the most current software updates. My Roku 3 will not play any content at all. I've reset the modem, router, and Roku device. The Roku is connected with excellent signal strength. All of my other Rokus are functioning as they should. The Roku 3 is the only one with problems.
Might your router be one supplied by your internet provider? If so, your problem may have been caused by a recent update to your router that reportedly affects some Roku models. This has been reported lately with equipment from Xfinity and Cox, but there may be others.
Affected users report the router configuration needs to be switched from g/n wifi protocols back to b/g/n. If you don't have access to your router's control panel you may have to have your internet provider do it for you. tiznom2000
Roku Community Streaming Expert I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well. If this post solves your problem please help others find this answer by clicking "Accept as Solution.".
Streaming Stick 4K+ 3821 | Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X