> CEC (Consumer Electronics Control) allows for HDMI devices to be controlled with one remote control.
> If you try to cast to a CEC supported TV while on a different source input (local TV channel, Cable, USB), source input will automatically switch to the HDMI port where the Chromecast is connected. Certain TVs will also power on (when powered off) when trying to cast to the Chromecast.
This is when it's plugged into the HDMI ARC port on a Samsung TV, which I think is a CEC port as well.
https://support.google.com/chromecast/answer/7199917
> What is CEC?
> CEC (Consumer Electronics Control) allows for HDMI devices to be controlled with one remote control.
> If you try to cast to a CEC supported TV while on a different source input (local TV channel, Cable, USB), source input will automatically switch to the HDMI port where the Chromecast is connected. Certain TVs will also power on (when powered off) when trying to cast to the Chromecast.