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-1-67-GHz-Keyboard/623/all#s3303 Remove the following 10 screws: Two 3 mm Phillips in the battery compartment, on either side of the battery contacts. Four 3 mm Phillips around the memory compartment. Four 16 mm Phillips along the hinge. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-67-GHz-Keyboard/623/all#s3309 Remove the memory compartment cover. Remove the two 12 mm Phillips screws on the Aluminum bracket at the top of the memory compartment. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-67-GHz-Keyboard/623/all#s3315 Rotate the computer 90 degrees clockwise so the power receptacle faces you. Remove the three 3 mm Phillips screws along the edge of the lower case. When replacing these screws, you must install them in the correct order. Begin by installing the screw closest to the display hinge, then work your way toward the front of the computer. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-67-GHz-Keyboard/623/all#s3316 Turn the computer 90 degrees clockwise so the hinge faces you. Remove the lower 5 mm Phillips screw on each side of the hinge (two total). /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-67-GHz-Keyboard/623/all#s3317 Rotate the computer 90 degrees clockwise so the ports face you. Remove the three 3 mm Phillips screws along the edge of the lower case. When replacing these screws, you must install them in the correct order. Begin by installing the screw closest to the display hinge, then work your way toward the front of the computer. Also, be careful not to put the screws in the two holes on either side of the video out port. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-67-GHz-Keyboard/623/all#s3318 Turn the computer over and open the display. Remove the two 4.2 mm long, 1.5 mm hex screws at the top corners of the upper case (two total). A T6 Torx driver will work, but repeated use will strip the screws. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-67-GHz-Keyboard/623/all#s3319 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-1-67-GHz-Keyboard/623/all#s3320 Rotate the upper case up and toward the screen, so that the upper case rests against it. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-67-GHz-Keyboard/623/all#s3321 Remove the amber tape securing the trackpad ribbon to the logic board. Disconnect the trackpad ribbon from the logic board by pulling up on the connector. Remove the upper case from the computer. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-67-GHz-Keyboard/623/all#s3322 On the following step, be careful with the tape on the side of the keyboard with the green power button, as the tape may stick and tear. Peel back the black plastic shielding on either side of the keyboard (there are two pieces). /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-67-GHz-Keyboard/623/all#s3323 Use your fingernail to flip up the light brown plastic flap locking the keyboard ribbon cable in its socket. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-67-GHz-Keyboard/623/all#s3324 Do the same for the keyboard backlight ribbon cable. Slide the cables from their sockets. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-67-GHz-Keyboard/623/all#s3325 Remove the 10 identical Phillips screws attaching the keyboard to the casing. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-67-GHz-Keyboard/623/all#s3326 There are four locking tabs along the back edge of the keyboard holding it in place. These tabs must be straightened before you can remove the keyboard. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-67-GHz-Keyboard/623/all#s3341 The first frame shows a tab in the "locked" position and the second frame shows the same tab in the "unlocked" position. Use needlenose pliers to bend each of the four tabs from the previous step so that they are all in the "unlocked" position. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-67-GHz-Keyboard/623/all#s3342 Place the upper casing on its edge and use a spudger to push the keyboard away from the casing, poking the spudger through the central keyboard screw hole. Grasp the keyboard as it separates from the casing. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-67-GHz-Keyboard/623/all#s3343 Maintaining your hold on the keyboard, lay the casing flat and gently bow the keyboard until the two tabs on either side of the keyboard come free. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-67-GHz-Keyboard/623/all#s3344 Slide the keyboard away from the trackpad and out of the upper case. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-67-GHz-Keyboard/623/all#s3345 To replace the keyboard, first slide the bottom tabs into the upper case. Then bow the keyboard out and first slide the tabs in on the right side of the keyboard, then slide in the tabs on the left side. /Guide/Installing-PowerBook-G4-Aluminum-15-Inch-1-67-GHz-Keyboard/623/all#s3346