16. Lift the system board out of the computer base.17. Turn the system board over.18. Remove the coin-cell battery (see Removing the Coin-Cell Battery).Replacing the System Board1. Follow the procedures in Before You Begin.2. Replace the coin-cell battery (see Replacing the Coin-Cell Battery).3. Turn the system board over.4. Align the screw holes on the system board with the screw holes on the computer base.5. Replace the four screws that secure the system board to the computer base.6. Replace the audio connector cover (see Replacing the Audio Connector Cover).7. Connect the thermal fan cable, speaker cable, and the USB module cable to the respective system board connectors.8. Replace the daughter board (see Replacing the Daughter Board).9. Replace the palm rest (see Replacing the Palm Rest).10. Replace the Bluetooth module (see Internal Module With Bluetooth® Wireless Technology).11. Replace the keyboard (see Replacing the Keyboard).12. Replace the center control cover (see Replacing the Center Control Cover).13. Replace the Mini-Card (see Replacing the Mini-Card).14. Replace the memory module(s) (see Replacing the Memory Module(s)).15. Replace the module cover (see Replacing the Module Cover).16. Replace the optical drive (see Replacing the Optical Drive).1 USB module cable connector 2 screws (4)3 system board 4 thermal fan cable connector5 speaker cable connector