Remove 7 screws located on the back of the controller using the TR-9 Toolbit

Then take off and replace the analog sticks if they arent functioning correctly.

Remove two screws from the D-Pad using a Phillips #0 Screwdriver, After doing so, you will see two latches underneath the screws that you just removed and you have to press the two latches at the same time to completely remove the D-Pad.

If you followed these directions successfully this is what the final result should look like.

Full IC Identification: