Use a coin to turn the battery locking screw 90 degrees to the right. Lift the battery out of the computer. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-867-MHz-Airport-Extreme-Card/201/all#s723 Flip down the door on the right side of the battery compartment. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-867-MHz-Airport-Extreme-Card/201/all#s728 Use a spudger to disconnect the Airport antenna from the card. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-867-MHz-Airport-Extreme-Card/201/all#s729 Grasp the plastic tab and pull the card out all the way. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-867-MHz-Airport-Extreme-Card/201/all#s730