On February 15, 2018 at 16:48, Curlyp said...
I did. In my post and in the video I mention HDMI-CEC is turned off on all devices. That is what makes this really odd.
I stopped reading after "XOBX" :-D
Can you turn the system on, go over to the DTV box and manually shut it off just to confirm CEC didn't remain on?