Steps for replacing malfunctioned directional pads in a Sony PSP-3000
Step 1 Battery
Place the PSP face down and locate the battery cover on the left side of the device.
Lift and remove the battery cover to reveal the battery.
Remove the battery.
Step 2 Casing
Peel back the warranty sticker that is behind the battery with a spudger or your fingernail.
Unscrew all four screws from the back of the PSP with the Phillips #00 Screwdriver.
Two are located behind the battery's warranty sticker.
Two are located on the right side of the PSP.
Next, unscrew the two screws located at the top of the PSP.
Then, remove the single screw from the bottom edge of the PSP (which is positioned next to the barcode).
Slide the spudger in between the outer casing of the PSP, beginning at the "R" shoulder button, and gently pry off the casing.
Remove the front casing completely.
Step 7 D-Pad
Peal up the rubber pad that is securing the D-pad buttons to the backside of the front casing.
Remove the D-pad and the rubber piece.