Things You'll Need
Instructions
Remove the PSP battery and memory stick and place them to the side. You will use these again, but for now they are not needed.
Insert the Magic memory stick followed by the Pandora battery. Press the "X" button to reflash the firmware to your PSP. When this is completed, press the "X" button once more to shut down the PSP.
Remove the battery and memory stick and replace them with the normal ones you removed in Step 1. Turn your PSP back on and plug the charger into the PSP to make sure the update goes as planned.
Select "System Update" and wait as your PSP is updated to the most recent PSP firmware. Your PSP should work again.