Your Premiere 3920 is only capable of connecting to your 2.4ghz band. (cannot see or use 5ghz).
You will need to verify that the 2.4ghz is Enabled and broadcasting (some ISP companies have disabled/turned off customers 2.4ghz radios), and if you are using a cable ISP (Xfinity, Comcast, AT&T), you will likely need to configure your router to use "Wireless Mode" b/g/n on the 2.4ghz band. (Edit your 2.4ghz Wireless Settings from the router or accompanying ISP mobile app). Also verify that the 2.4ghz is using a "Wireless Channel" between 1 and 11.
Feel free to post back with ISP (internet service provider) and any settings you are able to determine if you need more help. Also include router model number.
This happens every time I restart my xfinity modem-router. Use their app:
Click on Connect icon.
Then your WiFi network name.
Then Advanced Settings.
Then Edit your 2.4ghz.
Then use the drop-down box to change it to "802.11 b,g,n" (It's probably set to "802.11 g,n")
Then Apply, Save. And then restart your Roku.
It should be good to go!
Thank you! I followed these exact same instructions and still got Error 014.50 - Unable to Connect to Wireless Network
