ASUS - ZenTalk

I don't sure but for me if you send your phone to repair your data will be erased...

Oh... It's not good... You need to send your phone to Asus for warranty and it's probably the only thing you can do.

Hello. Have you tried to perform a force reboot ? You can do this by holding down the volume down and power buttons at the same time. I use this solution when this problem happen to me and it work.