Hi, @spookyorv31
Thanks for posting, and welcome to the Roku Community.
We understand that you are unable to establish a wired connection with your Onn Roku TV. We suggest reaching out to Spectrum's support directly and letting them know about your concern since the issue is likely within the Spectrum modem or its network setup.
They can be reached at Spectrum | Support
We hope this will be sorted out soon, and feel free to let us know if you have further concerns or inquries.
Best wishes,
Kash
Takashi O.
Roku Community Moderator