Okay, so I got a PSP 2004 on my hands, with a failed firmware flash. The display remains black when trying to turn it on. Green light stays on though. So i opened up my battery, cut the line with the number 19, essentially making it into a pandora battery. Plugged back in and it automatically booted/turned on the green light without me doing anything. So far so good. Next up i used Rains UltraLite MMS Maker to prepare my memory stick (5.00 m33-4/DCv8). Stuck that in my psp, replugged in the pandora battery - light turns on, but display remains black. manually turning it off and on didn't make a difference, nor holding the L-trigger while booting. What the hell? Can anyone help me get the PSP back to life?