Maybe try giving it a while on the chargee then toggle with the power button. I had a Lenovo tab once that did the same thing, it just suddenly died and I tried doing everything I could to revive it. So I just gave up and left it on the charger for a long time then gave it one last hold of the power button and presto! It was alive.
Sent from XT912
[AOSP/4.3] [ROM] Eclipse v5.1 build 6 spyder