Things You'll Need
Instructions
Turn the PSP off and remove the battery from the rear of the device. Remove the four screws behind the PSP battery with the Phillips head screwdriver. Remove the two screws on the opposite end of the PSP. Remove the last screw on the bottom edge of the PSP.
Gently lift the PSP faceplate off. Remove the button bar from the bottom edge of the PSP. Place this aside.
Insert the new button bar on the bottom edge of the PSP. Make sure the button bar cable is still connected on the right side of the button bar.
Place the faceplate back onto the PSP and tighten the screws back onto the PSP's rear. Turn the PSP back on and your bottom set of buttons will now work again.