The cable box needs to be left on so that when I turn on the TV it plays video from the Cable Box. Furthermore, there is no way to turn off the cable box. It has no power button...nor should it need to.
My Roku 4 has done this on occasion in the past, and the quick fix is to turn off One Touch Play. This disables HDMI CEC and should stop the problem. Hopefully the next firmware update will resolve the problem. I had the problem, then it was fixed, then it was broken again. Somebody misses something in the coding and fouls it up.
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One touch play is already disabled on my Roku TV. That's not the issue (at least not for me, anyway). Bear in mind my Roku unit is the TV itself. It is set to tune to the Cable Box when powered on. That is the desired behavior and works correctly.
The issue is that when the TV decides on it's own schedule to do a firmware update, it turns itself on when that update is done. It should not do this if it is going to force it's own updates at an ungodly hour.
Can someone from Roku please comment on this? Is this just a glaring oversight or are we missing something? Did you guys really intend to startle the daylights out of people at 4am by turning the TV on per a schedule that you and only you control?