Ok, so I have my Pandora battery and my Magic Memory Stick Trio version (with the Hellcat, Joker, and Pandora menus). I just went straight to the Cementario screen and flashed the firmware to 3.71 M33-2. It says it installed sucessfully! Problem is, that when I hit X to shut down, remove the Pandora Battery, remove the memory stick, and then turn on... it's bricked! I checked to make sure that I can get into the recovery menu (by holding the right trigger and booting... it works), and then selecting the recovery eboot, but it's still "bricked!" I get the Sony Screen at the beginning, and you can see the wallpaper "move" momentarily. Then, it hangs up before going to the XMB. The date, time, and battery indicator are greyed out, and it just STOPS. I tried re-flashing it a couple of times... with no luck. It does the exact same thing every single time. I thought of downgrading to 1.50 firmware, then up to 3.52 M33-4, but for some reason, I can't get the Pandora battery to flash the firmware back to 1.50. It will just go back up to the top-level Pandora menu (with the Joker, hellcat, and desprar al cementario menus), or else it will go black. Please help. I JUST got this PSP brand new (it's a PSP FAT) from a still-sealed box. (I got really lucky, they had ONE FAT PSP left!) Can anyone help me out? I tried searching in the forum, but I can't find ANYTHING that replicates this problem I am having!