10. Lift the fan release lever, then slide the fan toward the back of the computer to release the four fan tabs from the four slots in the bottom cover.
11. Remove the fan from the computer.
12. Disconnect the control-panel cable from the I/O panel connector by pulling with the cable loop.
13. If present, disconnect the thermal sensor cable (twisted pair) from the I/O panel.
14. Remove the drive panel (see Removing the Drive Panel).
15. If an optional sound card is installed, disconnect the cable from the top edge of the I/O panel. Otherwise, a jumper block is installed.
16. If an optional IEEE 1394 cable is installed in the front port, remove the cable from the front of the computer by following the instructions that came with
the connector.
17. Remove the mounting screw from the front of the I/O panel.
18. Remove the I/O panel from the computer.
Installing the I/O Panel
