Remove any media from the drives and turn off all connected devices and the computer.
Disconnect all power cords from electrical outlets and disconnect all cables that are connected to the computer.
Remove the computer cover. For details, see Computer cover.
Remove the internal speaker if necessary. For details, see Internal speaker.
Disconnect the system fan cable from the system fan connector on the system board. See Parts on the system board.
Connect the system fan cable to the system fan connector on the system board. See Parts on the system board.
Reinstall the computer cover and reconnect the cables. For details, see Completing the parts replacement.