Use a coin to turn the battery locking screw 90 degrees clockwise. Lift the battery out of the computer. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-5-1-67-GHz-Modem/346/all#s1389 Remove the four Phillips screws from the memory door. Slide the memory door away from the memory compartment. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-5-1-67-GHz-Modem/346/all#s1392 Remove the following 8 screws: Two 3 mm Phillips in the battery compartment, on either side of the battery contacts. Two 12 mm Phillips on either side of the memory compartment. Four 16 mm Phillips along the hinge. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-5-1-67-GHz-Modem/346/all#s1393 Rotate the computer 90 degrees clockwise, so that the power receptacle faces you. Remove the three 3 mm Phillips screws. When replacing these screws, you must place each screw in the correct order. Begin by installing the screw closest to the display hinge, and go out from there. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-5-1-67-GHz-Modem/346/all#s1394 Turn the computer 90 degrees clockwise so that the hinge faces you. Remove the bottom 5 mm Phillips screw on either side of the hinge (two total). /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-5-1-67-GHz-Modem/346/all#s1395 Rotate the computer 90 degrees clockwise, so that the ports face you. Remove the three 3 mm Phillips screws. When replacing these screws, you must place each screw in the correct order. Begin by installing the screw closest to the display hinge, and go out from there. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-5-1-67-GHz-Modem/346/all#s1396 Turn the computer over and open the display. Remove the two 1.5 mm hex screws in either corner, next to the display (a T6 Torx driver will work, but repeated use will strip the screws). /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-5-1-67-GHz-Modem/346/all#s1397 Grasp the back corners of the upper case and pull up. Do not pull the upper case off yet; you still need to disconnect the keyboard and trackpad cable. Lift the back of the case up and work your fingers along the sides, freeing the case as you go. Once you have freed the sides, you may need to rock the case up and down to free the front of the upper case. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-5-1-67-GHz-Modem/346/all#s1398 Rotate the upper case up and toward the screen, so that the upper case rests against it. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-5-1-67-GHz-Modem/346/all#s1399 Remove the orange tape securing the trackpad ribbon to the logic board. Disconnect the trackpad ribbon from the logic board. Remove the upper case from the computer. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-5-1-67-GHz-Modem/346/all#s1400 Remove the three long silver Phillips screws from the retaining bracket on the left side of the optical drive. Remove the retaining bracket. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-5-1-67-GHz-Modem/346/all#s1415 Disconnect the large orange hard drive cable from the logic board, removing tape as necessary. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-5-1-67-GHz-Modem/346/all#s1416 Lift the hard drive up from the right side and remove it from the computer. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-5-1-67-GHz-Modem/346/all#s1417 Remove the two silver Phillips screws from the modem board. The screw in the top left corner has a black washer. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-5-1-67-GHz-Modem/346/all#s1420 Disconnect the large orange ribbon cable from the top of the modem. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-5-1-67-GHz-Modem/346/all#s1421 Lift the modem up and disconnect the remaining cable, at which point the modem will be free. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-5-1-67-GHz-Modem/346/all#s1422