how do check my apple tv warranty?
this morning i updated my apple tv,after that that stop working?
how can i fixed/
Apple TV, iOS 7
Stopped working in what way?
Do you see a picture saying to connect to iTunes?
If so it means the update failed and your AppleTV can't start.
You need to restore by connecting to a computer running current iTunes via a USB to micro USB cable.
See:
http://support.apple.com/kb/HT4367
Pay attention to differences in power connection depending on whether or not you have AppleTV2 or AppleTV 3.