I put my ATV to sleep because it automatically puts my projector into the auto sleep process as well. Meaning I don't need to switch modes on my logitech remote to turn off my projector, I just hold down the select button to sleep the ATV and then 30 secs later, my projector turns off cause there is no signal over the HDMI.
**might be nothing, i tried it and it didn't work, i selected sleep now from the settings menu, the aTV went to sleep, i woke it up, and after that play/pause worked to put it to sleep.
not saying it's a issue, i might have been doing something wrong, but if you have problems, try that.
I ended up having to teach the Play/Pause Apple TV remote command to my Logitech Harmony remote. The predefined Apple TV codes it had must not have included the exact button command the Apple TV Remote sends for the Play/Pause.
Simply had to teach it and we are good to go. Good information for future browsers, since I know the Harmony remotes are pretty common.