Maintenance & Service Guide

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 10 operating system
Table 5-17 System board descriptions and part numbers
Description Spare part number
System board with integrated processor for use in models with UMA graphics memory:
● Intel Core i7-10510U processor L78087-xxx
● Intel Core i5-10210U processor L78085-xxx
● Intel Core i5-10210U processor (WWAN models) L78086-xxx
● Intel Core i3-10110U processor L78083-xxx
● Intel Core i3-10110U processor (WWAN models) L78084-xxx
System board with integrated processor for use in models with discrete graphics memory:
● Intel Core i7-10510U processor and NVIDIA GeForce MX250 graphics L78082-xxx
● Intel Core i7-10510U processor and NVIDIA GeForce MX130 graphics L78080-xxx
● Intel Core i5-10210U processor and NVIDIA GeForce MX250 graphics L78081-xxx
● Intel Core i5-10210U processor and NVIDIA GeForce MX130 graphics L78079-xxx
● Intel Core i3-10110U processor and NVIDIA GeForce MX130 graphics L78078-xxx
Before removing the system board, follow these steps:
1. Prepare the computer for disassembly (Preparation for disassembly on page 33).
2. Place the computer in Battery Safe mode (Battery Safe mode on page 33).
3. Remove the following components:
a. Bottom cover (Bottom cover on page 34).
b. Battery (Battery on page 36)
c. Battery connector board (Battery connector board on page 53)
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:
● Memory modules (Memory modules on page 37)
● WLAN/Bluetooth module (WLAN/Bluetooth combo card on page 39)
● M.2 solid-state drive (M.2 solid-state drive on page 43)
● Heat sink (Heat sink on page 48)
Remove the system board:
Component replacement procedures 59