You can reference How-To-Geek if you need help finding this setting on your TV. Different manufacturers have different branding for HDMI-CEC, but it was in the ‘General Settings’ under ‘External Device Manager’ on my Samsung TV. Since most TVs will ship with this HDMI-CEC disabled, you will need to enable this feature to use your TV remote or home theater remote with Chromecast. You Need to Enable This Feature On Your TV It has been around since 2008 and we’ve written about how this tech allows your Google Assistant to turn on the TV and play your favorite show with a simple, “Hey Google, play Stranger Things on the Living Room TV.” HDMI-CEC is also the reason your Chromecast can automatically switch inputs when you start casting.
The technology that makes this possible behind the scenes is called HDMI-CEC, or HDMI Consumer Electronic Controls, and is built into most modern TVs.
