just trying to solve this problem
now its very strange my psp will start up into a backlite screen, but no xmb comes up and the memory stick light flashes up as normal start up. but the problem is that it repeats this process of screen light up, memory stick light up forever. im quite aware this is as good as bricked in my mind. this all occured when i was tryng to downgrade from 2.0 to 1.5, and im pretty sure i didnt follow the instructions 100%, so im considering it all of a bring. if anyone has an ideas, or possible fixes, i would appreciate it.