Welcome to the Roku Community, @dadderin!
Thank you for reaching out regarding this matter. We'd be more than happy to provide further information and suggest some steps to help you connect your Roku TV to a network connection.
Firstly, how far is your router from your TV? We suggest moving it closer to your Roku TV for stronger signal strength. You may also check your network connection under Settings > Network > Check Network.
We also suggest checking our support article dedicated to this:
I hope you find this information helpful.
Best regards,
Carly
Carly Y.
Roku Community Moderator