I'm having a similar problem with my remote for Roku onn. Evey button turns the TV off and on except for the power button which isn't working at all. I know it's a remote problem because my phone works fine as a remote when it lets me "wake" the TV. Any suggestions?
Yes!! So I was up late trying to figure why the remote was going crazy. I finally gave up but had to take the batteries out, otherwise, the red light in the front sensor kept flickering. I left the batteries out all night, and decided to give it another try, I put the batteries back in and worked perfectly normal. Maybe it worked as a reset? 🤷🏻♀️ But beats waiting for the roku ppl to reply weeks later (just to say, it’s not our problem, contact the tv ppl) or ordering a new remote.
good luck