Welcome, felixblackcat. Sorry for your troubles.
You are not the first person to experience some kind of looping behavior on startup. I will search for threads reporting similar problems, and post them here for you to look over. Hopefully some of the suggestions that have helped others will help you.
Here's one you might like!
https://www.mobileread.com/forums/sho...d.php?t=160505
There is no recovery mode for the eDGe as it comes. I don't know for sure whether there is some recovery ability built into pablob's Golden Allmine, but I know Vicinc especially has been wanting it.
To get more help from the technically oriented people here, you might tell us what was happening right before you got stuck and what version of the Operating System you are running.
Good luck!