Hi, @Rlgreyhead
Thanks for posting, and welcome to the Roku Community.
We acknowledge your inquiry about the black screen on your Westinghouse Roku TV and appreciate your efforts in troubleshooting the issue.
For this matter, we advise contacting Westinghouse's support directly letting them know about your experience with their TV as Roku TV manufacturers provide direct support with their TV models, as Roku is only used as the operating system.
You can reach their support at Roku TVs - Westinghouse
We hope this will be sorted out soon.
Best wishes,
Kash
Takashi O.
Roku Community Moderator