Things You'll Need
Instructions
Place a soft cloth on a table. Place the PSP face down on the soft cloth. Rotate the PSP so that the drive door is facing away from you. Remove the battery compartment lid from the left side. Pull the battery out of the battery compartment.
Wait 10 seconds. Place the battery back into the battery compartment. Place the battery lid back onto the battery compartment. Turn the PSP over. Rotate the PSP so that the drive door is facing away from you.
Press in on the right trigger (the "R" button) at the upper-right edge of the PSP with one hand. Push up on the power switch at the lower-right edge with a finger of your other hand.
Release the power switch after 10 seconds. Continue holding the right trigger in until the PSP’s service recovery mode screen boots up and displays text on the LCD screen.
Press the “X” button. Use the direction pad to select the “Restart” button on the LCD screen. Press the “X” button again to restart the PSP normally.