With the case closed, place the Unibody top-side down on a flat surface. Depress the grooved side of the access door release latch enough to grab the free end. Lift the release latch until it is vertical. /Guide/Installing-MacBook-Pro-15-Inch-Unibody-Late-2008-and-Early-2009-Left-Fan/829/all#s4447 With the case closed, place the Unibody top-side down on a flat surface. Depress the grooved side of the access door release latch enough to grab the free end. Lift the release latch until it is vertical. /Guide/Installing-MacBook-Pro-15-Inch-Unibody-Late-2008-and-Early-2009-Left-Fan/829/all#s4447 The access door should now be raised enough to lift it up and out of the Unibody. /Guide/Installing-MacBook-Pro-15-Inch-Unibody-Late-2008-and-Early-2009-Left-Fan/829/all#s4448 Be sure the access door release latch is vertical before proceeding. Grab the translucent plastic tab and pull the battery up and out of the Unibody. If the latch is depressed it will lock the battery in place. /Guide/Installing-MacBook-Pro-15-Inch-Unibody-Late-2008-and-Early-2009-Left-Fan/829/all#s4449 Remove the following eight screws securing the lower case to the chassis: One 5.4 mm Phillips screw. Three 14 mm Phillips screws. Four 3.5 mm Phillips screws. /Guide/Installing-MacBook-Pro-15-Inch-Unibody-Late-2008-and-Early-2009-Left-Fan/829/all#s4453 Using both hands, lift and remove the lower case off the upper case. /Guide/Installing-MacBook-Pro-15-Inch-Unibody-Late-2008-and-Early-2009-Left-Fan/829/all#s4454 Use a spudger to pry the fan connector straight up off the logic board. It is useful to twist the spudger axially from beneath the fan cable wires to release the connector. The fan socket and the fan connector can be seen in the second and third pictures. Be careful not to break the plastic fan socket off the logic board as you use your spudger to lift the fan connector straight up and out of its socket. The layout of the logic board shown in the second picture may look slightly different than your machine but the fan socket is the same. /Guide/Installing-MacBook-Pro-15-Inch-Unibody-Late-2008-and-Early-2009-Left-Fan/829/all#s4478 Use a spudger to pry the fan connector straight up off the logic board. It is useful to twist the spudger axially from beneath the fan cable wires to release the connector. The fan socket and the fan connector can be seen in the second and third pictures. Be careful not to break the plastic fan socket off the logic board as you use your spudger to lift the fan connector straight up and out of its socket. The layout of the logic board shown in the second picture may look slightly different than your machine but the fan socket is the same. /Guide/Installing-MacBook-Pro-15-Inch-Unibody-Late-2008-and-Early-2009-Left-Fan/829/all#s4478 Use a spudger to pry the fan connector straight up off the logic board. It is useful to twist the spudger axially from beneath the fan cable wires to release the connector. The fan socket and the fan connector can be seen in the second and third pictures. Be careful not to break the plastic fan socket off the logic board as you use your spudger to lift the fan connector straight up and out of its socket. The layout of the logic board shown in the second picture may look slightly different than your machine but the fan socket is the same. /Guide/Installing-MacBook-Pro-15-Inch-Unibody-Late-2008-and-Early-2009-Left-Fan/829/all#s4478 Remove three 3.5 mm Phillips screws securing the left fan to the upper case and logic board. /Guide/Installing-MacBook-Pro-15-Inch-Unibody-Late-2008-and-Early-2009-Left-Fan/829/all#s4479 Lift the fan out of the upper case. /Guide/Installing-MacBook-Pro-15-Inch-Unibody-Late-2008-and-Early-2009-Left-Fan/829/all#s4480