Endless Paradigm

I tried upgrading from 3.52 to 3.90 on my fat psp, but I had the same message as above, which i said yes to. After it "corrected" my IDstorage keys, it said that the 3.90 custom firmware was unable to install. then the screen froze. I pressed a few buttons to get out of the screen but nothing happened, so i restarted it. But when it restarted, the green light came on and the dreadful black screen was there. Now my psp is being used as a paperweight. I've read somewhere that Pandora's Battery is useless on bricked psp's with corrupt IDstorage keys. Anyone have the same experience? And any solutions? I am going to attempt the pandora's battery but reading other forums, due to corrupt IDstorage keys, nothing works. Thanks for any insight on the situation.

try the timemachine by DA i believe its not dependent on keys
also try pandora it might
and next time post a thread and don't bump old threads

Effing Keys... Yeah...  

I hate them all..  I have no idea how to help since Ive never been there with such problem. But your best chance is to try "Pandora"  try that out even when people say it won't work, like give it a chance.

Good luck! and hope your bring that psp back to life.