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e. WWAN module (see WWAN module on page 41)
f. Keyboard (see
Keyboard on page 45)
g. Top cover (see
Top cover on page 47)
h. System board (see
System board on page 61)
Remove the heat sink:
1. Position the system board upside-down with the front toward you.
2. To remove the UMA heat sink, skip to step 6.
3. To remove the discrete heat sink, disconnect the fan cable (1) from the system board.
4. Loosen the six captive Phillips screws (2) that secure the heat sink to the system board.
5. Lift the heat sink off the system board (3).
6. To remove the UMA heat sink, disconnect the fan cable (1) from the system board.
7. Loosen the four captive Phillips screws (2) that secure the heat sink to the system board.
64 Chapter 4 Removal and replacement procedures