Hi, @walter44,
A warm welcome here in the Roku Community!
We're glad to assist you with your problem powering your TV. May we know what Roku device you are using right now? (e.g., Roku Express, Roku Streambar, Roku TV; specify brand of TV) How are you powering your Roku device? With more details, we'll be able to assist you further. In the meantime, please ensure that you are powering your Roku device directly to the wall outlet and not at the back of the TV (if it's not a Roku TV) or to a power strip. You can also try restarting the system by pressing Home > Settings > System > Power (if you do not see a Power submenu, skip to the next step) > System restart.
Please keep us posted on what you find out!
All the best,
Eunice
Eunice L.
Roku Community Moderator