This tutorial is for those who have a fully-bricked PSP and doesn't have a Pandora battery. Here are the steps:[*]Take out your PSP's battery cover and a battery.[*]Get an AC adapter and plug on your PSP WITHOUT the battery.[*]Turn on your PSP and, instead of a black screen, the firmware appears correctly on your screen![*]Place a battery and put back the cover on your PSP while charging.[*]When it's 100 percent charged, take out an AC Adapter on your PSP. Please don't turn off your PSP after using; put it to sleep mode instead.[*]That's it! You're done.This is what I did to recover my PSP, which is fully-bricked last month. You can do this tutorial too!