Consumer electronic control

Do I want HDMI-CEC on or off?

In a general sense, yes, HDMI-CEC is worth having.
It allows devices to talk to each other, adds convenience and simplifies the process.
Often all you'll need to do is switch to the sources' HDMI input and the game console/Blu-ray will switch on automatically.
It isn't perfect though..

Should HDMI-CEC be on or off?

HDMI-CEC should, on most TVs, be enabled by default.
We'd recommend connecting any new devices to a TV before you turn it on, to give the TV a chance to recognise the input.
To see whether HDMI-CEC is enabled, you'll need to go into the TV's settings, and it won't always be the same menu or section for each TV..

What are CEC commands?

CEC commands

What is a CEC device?

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..