Apple Powerbank G4 manual

Center that side over the mating surface (raised surface) and evenly apply it, without air pockets, by lightly pressing on the protective backing of the other side.

Remove the remaining protective backing.

Important: With an X-Acto knife, trim any excess thermal pad material that extends beyond the mating surface, if necessary, to prevent it from touching holes in the heatsink.

78 - PowerBook G4 (17-inch) Take Apart Logic Board