iMac G5, 17-inch Take Apart -
Logic Board
3. Disconnect the hard drive thermal sensor (near the memory slots) from the logic
board. Leave the other end of the thermal sensor attached to the hard drive.
4. Using a T-8 screwdriver, disconnect the two fan duct screws and lift the duct off the
logic board. Note: These two screws are longer than the other silver screws securing
the logic board to the midplane chassis.