Hi, @toredd.
Welcome and thank you for posting here in the Roku Community!
We'd be more than happy to find you the best course of action regarding your concern with your Roku TV not turning on.
In this case, because it's a hardware problem, we recommend contacting the television manufacturer for more information, as they are the most knowledgeable about their product. You may reach them through Onn TV Support
We hope this will be sorted out soon.
Regards,
Reynan
Reynan L.
Roku Community Moderator