Maintenance and 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 operating system
Table 6-12 System board descriptions and part numbers
Description Spare part number
Intel i7-8665U processor L60637-xx1
Intel i7-8665U processor (OSR) L60638-xx1
Intel i7-8565U processor L60636-xx1
Intel i5-8365U processor L60635-xx1
Intel i5-8265U processor L60634-xx1
Intel i3-8145U processor L60633-xx1
USB connector bracket L65688-001 (Bracket Kit)
Before removing the system board, follow these steps:
1. Prepare the computer for disassembly (Preparation for disassembly on page 32).
2. Remove the bottom cover (see Bottom cover on page 32).
3. Remove the battery (see Battery on page 45).
4. Remove the keyboard (see Keyboard on page 41).
5. Remove the fan (see Fan on page 57).
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:
● SIM card blank (only models without WWAN)
IMPORTANT: After removing the system board, remove the SIM card blank from the old system board
and insert into the new system board.
● Solid-state drive (see Solid-state drive (SSD) on page 34)
● Memory modules (see Memory modules on page 35)
● WLAN/Bluetooth module (see WLAN/Bluetooth combo card on page 37)
● WWAN module (see WWAN module on page 39)
● Heat sink (see Heat sink assembly on page 48)
Remove the system board:
1. Position the computer upright and open as far as possible.
Component replacement procedures 59