Maintenance and Service Guide

When replacing the system board, be sure to remove the following components (as applicable) from the
defective system board and install on the replacement system board:
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Solid-state drive (see Solid-state drive (SSD) on page 40)
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Memory modules (see Memory modules on page 41)
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WLAN/Bluetooth module (see WLAN/Bluetooth combo card on page 43)
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WWAN module (see WWAN module on page 45)
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Heat sink (see Heat sink assembly on page 53)
Remove the system board:
1. Position the computer upright and open as far as possible.
2. Remove the three Phillips M2.5×3.0 screws that secure the system board to the computer.
3. Close the computer and position it upside down.
70 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts