I bricked my psp by messing around with flash0 by trying to install themes. I had 3.52 m33 CFW. Also recovery menu is not accessible.
I have tried several times on my psp to unbrick it. Since i didnt have a nand flash backup prior to bricking it, i tried to downgrade it back to 1.5. However, the problem is that at the end of the downgrade, it says something like "updating registry....cannot write system.dreg"
So i thought it would be worth a try to turn on the psp normally. Instead, i get a constant BSOD. Everytime i press O, it just comes up again.
Can anyone help me with this?