Default [Q] novo 10 eternal (captain) quadcore stuck at boot

Hi,

I have a Novo 10 eternal (captain) quadcore tablet with a custom rom.
Everythink worked great and super fast.
One day I click on an app and the tablet shuts down and won't go past: "ainol tab novo 10 captain quadcore".
It is also not possible to start in recovery.

Any help would be very much appreciated.
Thanks