After my roku streaming stick updated it no longer recognizes my tv. We have an LG TV that we lost the regular remote for so we were only able to use the roku remote to turn the tv on and off and fix the volume. Very inconvenient. It was working perfectly before but then it updated on July 27 and now does not work. Maybe our TV is too old? But I just really despise how technology pretty much always forces you to buy new things. If anyone knows how to uninstall updates that be great! Or any other way to fix this problem. I do not have the money for a new tv. Last thing I tried was using an adapter instead of plugging into HDMI directly.
It’s also possible that the IR receiver in the TV has failed or has been blocked. Do you have no other remotes that can control the TV? (ie some blue ray player, satellite dish, cable box etc. remotes can be set to control TVs as well.) If not, there are lots of universal remotes out there.