I just bought my Roku SE today and I can't connect to internet and it says "no networks found". I don't know what to do, I can't even access the configuration menu.
Thanks for reaching out regarding the issue you are experiencing.
We recommend starting here to troubleshoot Network issues: What should I do if I cannot connect to my home network or ...We recommend rebooting both your wireless router and your Roku device.I'd also recommend trying to connect your device to an alternate network, such as a mobile hotspot.
Please try doing this and see if it helps with what you're experiencing.