[MBCook]

Sadly there's no way to disable having it power the TV off without also disabling the ability to control the TVs volume.

[millstone]

If you haven't yet, check your TV settings. My Samsung has a buried option "Auto Turn Off" under HDMI. Disabling this prevents the AppleTV from turning off the TV.

[dogma1138]

Yes there is you should have HDMI CEC settings somewhere depends on the TV you can set what exactly is passed and is it bi-directional or not. At the least CEC power is available on virtually every appliance I've seen.

[saagarjha]

Funny, at times my Apple TV seems to do just that…though in my case it's probably just a bug.

[tinus_hn]

For some TVs the power off signal is sent using infrared, surprisingly.

[akvadrako]

It works for me; they are separate settings.