1.Place the computer upside down on a soft cloth.

2.Remove the four identical screws from the memory door.

3.Use a black stick to lift off the memory door.

4.Touch a metal surface inside the computer to discharge static electricity from your body.

5.If a memory card is already installed, release it by spreading apart the tabs in the expansion slot from the notches in the card. Allow the card to pop up slightly, and pull it out of the memory slot.

Memory Door and Memory Card

PowerBook G4 (12-inch) Take Apart - 11

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Apple G4 (12-INCH DVI) manual