Apple TV remote doesn’t automatically switch inputs
Any idea why my Apple TV 4K won’t control my receiver and switch to the right input or turn off my tv anymore? Out of nowhere it just stopped.
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Verify your CEC settings on the HDMI devices involved (i.e. including TV and receiver).
On Apple TV (4th generation or later), the setting is in: Settings﹥Remotes and Devices﹥Control TVs and Receivers﹥On.
For your other devices, see their manuals.