Roku TV turning off and on by itself

My TCL roku TV turns itself off and on. Then, it's like someone else is controlling it because the input screen will come up without me doing it and then they start to scroll on the screen. It even does it when no one is at home. I've taken the batteries out of my remote, did a reset, and have even called support. It seems to stop for a while but then starts again. Does anyone have any suggestions?