Things You'll Need
Instructions
Turn the PSP Slim off and remove the battery/memory stick from the device. Place these to the side.
Insert the Magic memory stick and Pandora battery into the PSP. The PSP will turn on and will be in service mode. Press the "X" button twice to downgrade the PSP back to the original PSP firmware.
Press the "X" button again to shutoff the PSP when the installation is complete. Remove the Pandora battery/Magic memory stick and replace them with the normal ones.
Turn the PSP back on and select the "System Update" feature to upgrade the PSP Slim back to the most recent Sony firmware or keep the PSP Slim at 1.50.