Service Manual

Table Of Contents
I/O board
Removing the I/O board
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the microSD-card.
3. Remove the SIM card tray for 4G LTE enabled systems.
4. Enter the service mode.
5. Remove the base cover.
6. Remove the ethernet port.
About this task
NOTE: The following image is from computers with integrated graphic card. For computers with discrete graphic card, the
system board has a different configuration.
NOTE: The following image is from systems without power-button board.
The following image indicates the location of the I/O board and provides a visual representation of the removal procedure.
Steps
1. For systems shipped with power-button board, peel the adhesive, open the latch and disconnect the power-button board
cable from the connector on the I/O board.
2. Open the latch and disconnect the I/O cable from the connector on the system board.
3. Disconnect the USB cable and coin-cell cable from the connectors on the system board.
4. Remove the two (M2x3) screws that secure the I/O board on the palmrest assembly.
5. Lift and remove the I/O board from the palmrest assembly.
Removing and installing components
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