System board
NOTE: All system board spare part kits include replacement thermal material.
All system boards use the following part numbers:
xxxxxx-001: Non-Windows operating systems
xxxxxx-601: Windows operating system
Description Spare part number
System board for use in models with discrete graphics memory:
Intel Core i7-8550U processor with 2 GB of discrete graphics memory L23228-xx1
Intel Core i5-8250U processor with 4 GB of discrete graphics memory L23229-xx1
Intel Core i5-8250U processor with 2 GB of discrete graphics memory L23227-xx1
Intel Core i3-7020U processor with 2 GB of discrete graphics memory L23226-xx1
System board for use in models with UMA graphics memory:
Intel Core i7-8550U processor L23233-xx1
Intel Core i5-8250U processor L23232-xx1
Intel Core i3-8130U processor L23231-xx1
Intel Core i3-7020U processor L23230-xx1
Intel Pentium N5000 processor L23236-xx1
Intel Celeron N4000 processor L23234-xx1
Intel Celeron N4000 processor, models with 64 GB eMMC memory L23235-xx1
Before removing the system board, follow these steps:
1. Shut down the computer.
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 following components:
a. Bottom cover (see Bottom cover on page 29)
b. Battery (see Battery on page 31)
c. Hard drive (see Hard drive on page 35)
d. Solid-state drive (see Solid-state drive on page 37)
e. WLAN module (see WLAN module on page 38)
f. Memory modules (see Memory on page 33)
Remove the system board:
IMPORTANT: Make special note of each screw size and location during removal and replacement
48 Chapter 5 Removal and replacement procedures for Authorized Service Provider parts