Apple TV 3 light turns on and off when asleep

You can't stop it, unless you unplug it.

Over the light wow...if you have a TV with some special flavor of HDMI-CEC it can do this when it randomly sends signals or what not like Samsung AnyNet+ or if there is network activity

So lets say you TV sends a signal to turn on other CEC devices or see which was connected light blinks but if you switch to Apple TV input it's still asleep.

Let's say your DHCP lease is up or your WiFi is changing keys it will renegotiate the light just tells you it did that (ala a Ethernet port on a computer or many devices that flashes.

Also the remote app can can do it so you can send a signal to turn it on, or whenever something is checking for AirPlay devices available

I can't believe your taking it back over this and not just taking a black sharpie and dotting it.

I have two ATV3s, and both turn on and off for a short period of time with nothing appearing on my TV screen when I switch to HDMI. I haven't noticed if they are both on at the same time, but I plan try and watch for that. This is not a big deal, but annoying to have the power light randomly turn on and off, and I am curious why it does so? Could it be that I said it was OK to send info to Apple? Or could it be that I have the time set to automatic?

Once again it's eithers

Your wifi renegotiating or even Ethernet your, maybe your DHCP lease is up with the router.

The Internet connection must be set where you can send a tiny signal to wake your Apple TV so it has to keep a low power connection.

This article might help http://support.apple.com/kb/HT3774

Or your TV is sending out HDMI-CEC signals or handshaking or something.

The light displays HDMI/network activity but if you go to the input on your Tv the apple tv will still be off.

The Apple TV only uses 6 watts of power, where as a PS3 uses over 100 watts, laptop chargers use 60-90, and DirecTV HD DVRS use 35.

I have been threw this for some time now and even went threw apple to get my ATV3 swaped out ..and it still happens

well I figured it out and the culprit is AIR PLAY ...Turn it off on the ATV and it should stop doing it ..

Hold the power button for 5 seconds, it will turn the ATV off.

Hold the power button for 5 seconds, it will turn the ATV off. When you want to use the ATV again turn it on.

It's the AirPlay / Airtunes feature in the airport express or a Extreame go into the router settings and turn off AirPlay / AirTunes and the random light on and off will stop hope this puts this issue to bed ..because it drove me nuts for a long and menny trips to apple and I finally nailed it ....