My Roku has worked fine for over a year and now all of the sudden it is not connected. It doesn't find my network although it finds all of the neighbors. I have restarted my router and the Roku numerous times with no success. What is wrong?
Is the Roku connected to the wall outlet? If so then I’d say that your Roku device is defective. If it’s still under warranty, you could probably contact Roku Customer Support at https://support.roku.com/contactus.
Hopefully someone at Roku will help you more in this situation.
~ Jordan
There are some router setting issues that can prevent establishing Roku wifi connections. And to make matters worse, some of them can be caused by recently-reported router updates. These have primarily been reported with routers supplied by internet providers (Comcast/xfinity, Cox, and AT&T so far), but it's possible they could also occur with other internet providers or user-owned routers that have received similar update.
Thanks to forum user @AvsGunnar for providing the links below to instructions for reconfiguring router settings for the listed internet suppliers. If you can't do this yourself, you may need to contact your internet provider to make these changes for you:
If your problem was not caused by any of the above, often a restart of the router (even if other devices are still connecting) followed by a restart of the Roku will allow the connection to be reestablished. Depending on your Roku model and Roku version number you'll find the "System restart" option under either "Settings > System > Power" or "Settings > System", or if more convenient you can just remove the Roku's power for a few seconds and let it restart.