Hi, @Jorgelgarza
Thanks for posting, and welcome to the Roku Community.
We understand that your Roku TV experienced a black screen issue while the sound is working. We're here to guide you with the option to resolve the issue. For this matter, we recommend reaching out to Onn's support since this issue is highly related to hardware malfunction, specifically with the backlit of the TV. Roku TV manufacturers provide direct support with their TV models, and they'll be able to assist you further.
You can contact them at Onn Support
We hope this will be sorted out soon.
Best wishes,
Kash
Takashi O.
Roku Community Moderator