System board
NOTE: The system board spare part kit includes replacement thermal materials.
Table 5-15 System board description and number
Description Spare part number
System board (includes thermal pad kit and thermal grease)
All system boards use the following part numbers:
xxxxxx-001: Non-Windows operating systems
xxxxxx-601: Windows 10 operating system
For use in models with discrete graphics memory:
● Intel Core i7-8850H processor L25093-xx1
● Intel Core i7-8750H processor L25092-xx1
● Intel Core i5-8400H processor L25091-xx1
● Intel Core i5-8300H processor L25090-xx1
● Intel Xeon E-2176M processor L25096-xx1
For use in models with UMA graphics memory:
● Intel Core i5-8400H processor L25095-xx1
● Intel Core i5-8300H processor L25094-xx1
Before removing the system board, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is o or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by rst unplugging the power cord from the AC outlet and then
unplugging the AC adapter from the computer.
4. Remove the bottom cover (see Bottom cover on page 38).
5. Remove the battery (see Battery on page 40).
6. Remove the WLAN module (see WLAN module on page 42).
7. Remove the memory module (see Memory module on page 44).
8. Remove the hard drive (see Hard drive on page 48).
9. Remove the solid-state drive (see Solid-state drive (SSD) on page 46).
10. Remove the fans (see Fans on page 51).
IMPORTANT: You do not have to remove the heat sink to remove the system board.
To remove the system board:
1. Position the computer upright, and then disconnect the following cables from the system board:
(1): Keyboard cable (ZIF)
Component replacement procedures 63
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