Things You'll Need
Instructions
Unplug your PS3 controller from the port on the front of the PS3. Turn the controller over so that you have access to the back of it.
Remove the five screws secured to the sides of the rear of the controller.
Use your fingers to pry the two halves of the controller apart. You will now have access to the "L2" button port.
Plug the "L2" button into the port until it snaps in place.
Replace the two halves of the controller and the five screws on the back of the computer.