Unhappy [Q] Ainol Novo Captain/Eternal bricked

Heu guys.I have Ainol novo Eternal/Captain.

I installed CM after having charging/booting up problems with original rom.

I was using it for a while, but it bricked. There was a low battery sign, and it goes for hours making that annoying sound, so I turned it off, next day i started charging and - nothing happens.

It doesn't respond to anything. Computer doesn't recognise it. What shall I do?

I found previous thread about connecting 2 pins saying ADFU, that didn't help. Still can't recongnise the device on my computer.

Any clues?