my psp seems bricked, need help to revive it! there was custom 3.9 m33 on it, i did a software update to 4.01 , seems ok, but i don't know why day after i cannot power on it. black screen. with my pandora battery, and memory stick i still boot on menu to install custom firmware but they all hang on flash 0 ... OK on formatting flash1 .... stop here. help is welcome thanks!