4. Remove the base enclosure (see Base enclosure on page 32).
5. Remove the battery (see Battery on page 34), and then remove the following components:
a. Hard drive (see Hard drive on page 39).
b. SSD (see SSD (M.2) on page 41).
c. Fans (see Fans on page 48).
NOTE: When replacing the system board, be sure that the following components are removed from the
defective system board and installed on the replacement system board:
●
Heat sink for hybrid graphics (see Heat sink for hybrid graphics memory on page 49).
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Heat sink for CPU and graphics (see Heat sink for CPU and graphics on page 50).
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WLAN module (see WLAN module on page 44)
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Memory module (see Memory on page 42)
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RTC battery (see RTC battery on page 55)
Remove the system board:
1. Disconnect the following cables and zero-insertion force (ZIF) connectors from the system board:
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Wireless antenna cable (1)
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Speaker cable (2)
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Keyboard cable (3)
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Display cable (4)
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USB board cable (5)
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TouchPad cable (6)
●
Memory cable (7)
54 Chapter 5 Removal and replacement procedures for authorized service provider parts