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13. Lift the system board assembly to disconnect the connector on the system board from the connector on the I/O board.
14. Turn the system board assembly over.
15. Remove the coin-cell battery (see Removing the Coin-Cell Battery).
16. Remove the thermal cooling assembly (see Removing the Thermal Cooling Assembly).
17. Remove the processor module (see Removing the Processor Module).
Replacing the System Board
1. Follow the instructions in Before You Begin.
2. Replace the processor module (see Replacing the Processor Module).
3. Replace the thermal cooling assembly (see Replacing the Thermal Cooling Assembly).
4. Replace the coin-cell battery (see Replacing the Coin-Cell Battery).
5. Turn the system board assembly over.
6. Align the connectors on the system board with the slots on the computer base.
7. Gently press the system board to connect the connector on the system board to the connector on the I/O board.
8. Replace the three screws that secure the system board assembly to the computer base.
9. Connect the display cable and the speakers cable to the connectors on the system board.
10. Replace the Bluetooth card (see Replacing the Bluetooth Card).
11. Replace the palm rest (see Replacing the Palm Rest).
12. Replace the keyboard (see Replacing the Keyboard).
13. Replace the memory module(s) (see Replacing the Memory Module(s)).
14. Replace the module cover (see Replacing the Module Cover).
15. Follow the instructions from step 3 to step 4 in Replacing the Optical Drive.
16. Follow the instructions from step 4 to step 5 in Replacing the Hard Drive.
17. Replace the battery (see Replacing the Battery).
18. Replace any card or blank removed from the 5-in-1 media card reader.
19. Turn on the computer.
20. Enter the service tag (see Entering the Service Tag in the BIOS).
Entering the Service Tag in the BIOS
1. Ensure that the AC adapter is plugged in and that the main battery is installed properly.
CAUTION: Before turning on the computer, replace all screws and ensure that no stray screws remain inside the computer. Failure to do so may
result in damage to the computer.
NOTE: After you have replaced the system board, enter the computer Service Tag in the BIOS of the replacement system board.