Kornout,
this guy (Pakelika), message #7,
https://www.mobileread.com/forums/sho...d.php?t=177521 also had the same problem.
I believe the cause is this:
the battery runs out completely when the device is booting. It freeze everything - maybe short circuit some thing (I doubt it) - some people still have the green light, some people dont have the green light.
Just like Papelika above, I did jailbreak the kindle.
Just like others, my kindle crashed when reading a "broken" book which cause the kindle crash in some point - then I have to reset it several times.
My conclusion:
reseting with a very low battery will lock up the kindle in the middle of booting process (it happen when the battery runs out completely).