PowerBook G4 (17-inch) Take Apart -
23
Top Case
9. Check that the perimeter metal tabs are not bent.
Note:
Do not bend the tabs; the metal quickly fatigues and can break off easily.
10. Lay the top case upside down and locate the flex cable.
11. While pulling the cable up, run a finger along its base to crease it at a 90-degree
angle.