Remove the following pentalobe screws securing the lower case to the MacBook Pro with Retina display.

• Eight 3.0 mm
• Two 2.3 mm

Lifting from the edge nearest the clutch cover, lift the lower case off the MacBook Pro.

Set the lower case aside.

Peel back the warning label covering the battery connector.

Using the flat end of a spudger, gently pry the battery connector straight up out of its socket on the logic board.

Bend the battery cables back and out of the way, ensuring that the battery connector doesn't accidentally make contact with the logic board.

Use the flat end of a spudger to lift the rubber heat sink cover up off the left fan.

Remove the following three screws securing the left fan to the logic board:

• One 4.4 mm T5 Torx screw
• One 5.0 mm T5 Torx screw
• One 3.9 mm T5 Wide Head Torx screw

Use the tip of a spudger to flip up the retaining flap on the left fan ribbon cable ZIF socket.

Be sure you are prying up on the hinged retaining flap, not the socket itself.

Starting at the top of the cable, slide a plastic opening tool under the left fan cable to free it from the logic board.

• Use caution when freeing the cable, as it is strongly adhered to the logic board.

Lift the left fan out of the device.