Hi, I have a very annoying problem! I'm downgrading someone's psp which is a 3.50 Phat but when I put the battery and UPMS while holding L button, the actual PSP boots up instead of Pandora menu!!! I tested the mem card and battery on my both homebrew PSPs which they had 3.52 and upgraded them to 3.71. So there should be nothing wrong with the pandora. Is it the PSP or what? Tnx waiting for your reply.