Bricked RBR40

(Chose RBR50 in the model field, because RBR40 was not in the list)

Hi,

My RBR40 won't boot anymore. The power led remains green whatever the action on the reset button, and no upper led is ever blinking. 

The ethernet plugs are also off.

Is there a way to restart it or is it dead?

Thanks for your help!!