Recovery loop - Greenpois0n initialize pd

Hi all,
My iPhone 4 is stuck in a recovery loop after suffering water damage.
I can exit recovery using tinyumbrella, upon which the phone shows a black screen with some lines belonging to greenpois0n (see photo).
image
If I try to restore from PWND DFU I get 160x errors.
The phone had iOS 6.1.2 installed, jailbroken with evasi0n (not unlocked).
Any ideas?
Thanks a lot!