Hi @Minicola,
Welcome to the Roku Community!
We understand you're having a problem with the antenna channels. We're happy to assist you further. Please try to re-scan again the antenna channels by following these steps by going to Settings > TV inputs > Live TV > Set up input.
You may also check out this support article here for more information.
Let us know how it works, and we will continue to assist you further.
Kind regards,
John
John
Roku Community Moderator