First of all, we must apply heat to the back cover to soften the adhesive that holds the case, and with the help of one or more plastic spikes we will take off all the edges of the case.

We extract the five Phillips screws (PH # 00) that hold the trim, and with the help of a flat-tipped tool we will lift it.

We remove the twelve Phillips screws (PH # 00) that hold the intermediate casing, but before starting to unhook it we must extract the card tray, and then with the help of one or more prongs we will unhook all the edges of the casing.

To finish, with the help of tweezers we will unhook the keys that we have to replace.