Things You'll Need
Instructions
Turn off your PS3 and unplug the controller from the port on the front of the console.
Turn the controller over and remove the five screws along the edges of the back of the controller.
Pull the two halves of the controller apart and set the back half aside. The motherboard can now be seen in the front half.
Remove the single screw in the center of the motherboard. Lift the motherboard up to expose the rear of the button pad. Press the "X" button down to pop it back in place.
Replace the motherboard and tighten the screw. Replace the back housing and five screws.