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.
@tiznom2from -
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