Things You'll Need
Instructions
Turn off your Sony PSP and remove the memory stick and battery from the device. Place these to the side.
Insert your Magic memory stick into the PSP card reader. This memory stick holds the custom firmware that will be re-flashed to the PSP.
Insert the Pandora battery and the PSP will turn on automatically, going into service mode. Press the "X" button twice to reinstall custom firmware onto your PSP.
Press the "X" button once more to turn off the PSP after the install completes. Reinsert the normal battery and memory stick that you removed in step one. Turn the PSP on and the PSP will be fully functional again.