No Signal on Apple TV 3

Hey guys,
I'm a frequent flier, so a couple of months ago I've bought the apple tv.
It's a great product to connect it on hotels, and then use my mac or ipad with airplay to watch movies and series.

Usually I remember to turn off, but this time I've just disconnected.
After that it doesn't work anymore  
I mean, when I turn it on I don't got any signal from the TV.

First I've checked if the HDMI cable was ok, so I've used with the ipad and I have signal, so both cable and tv are ok.

Then I did a hard reset on the Apple TV. Again nothing.

Finally I connected to my mac and restore it.
After that when I connect to my itunes this appear:

but again, nothing happen, still no signal.

Do you happen to know what's going...

please help me.
thanks...