Use a coin to turn the battery locking screw 90 degrees clockwise. Lift the battery out of the computer. /Guide/Repair/PowerBook-G4-Aluminum-15-Inch-1-1-5-GHz-RAM/220/all#s796 Remove the four Phillips screws from the memory door. Slide the memory door away from the memory compartment. /Guide/Repair/PowerBook-G4-Aluminum-15-Inch-1-1-5-GHz-RAM/220/all#s797 Release the tabs on each side of the RAM chip at the same time. These tabs lock the chip in place and releasing them will cause the chip to "pop" up. Pull the chip directly out from its connectors. If there is a second RAM chip installed, pop it out in the same manner. /Guide/Repair/PowerBook-G4-Aluminum-15-Inch-1-1-5-GHz-RAM/220/all#s798