First: I don't have hope that someone can help. But hope should always be the last thing vanishing...
The question is:
Does anyone know a possibility to UNBRICK a Sony PRS 350?
Facts:
I flashed a non functional firmware (my mistake) on the 350
It sticks now in an boot loop
Restarting every 20 seconds
Black progress bar goes around 5mm to the right then rebooting again
No possibility to mound the reader as USB drive
No hard/soft reset possible
Thanks for advices or words of hope