Hi @jianvoma,
Thanks for posting, and welcome to the Roku Community!
We appreciate you for letting us know about the trouble you've encountered with the antenna channels on your Roku TV.
For troubleshooting purposes, we recommend to restart your modem and router. After restarting your wireless network connection, please restart your Roku TV by navigating to Settings > System > Power > System restart (if you do not see a Power submenu, skip to the next step).
Feel free to keep us posted on what you find out, and we'll continue assisting you from there.
All the best,
Chel
Jecheal R.
Roku Community Moderator