Hi rock86,
Thanks for your first post in the Roku Community!
We appreciate you letting us know about this issue with the Roku Streaming Stick that keeps turning off. We want to make sure that we can get this resolved as soon as possible.
How are you powering the device? Is it plugged into the TV USB port, or is it plugged into the wall outlet with the provided cables? In addition, have you tried using another HDMI port on your TV as well as trying your device on another TV to see if you are seeing the same issue?
If the behavior continues, review the suggestions for determining why the Roku device is not powering on What to do if your Roku streaming player will not power on | Official Roku Support
Please keep us posted and we'll continue assisting you from there.
Best regards,
Mary