Maintenance and Service Guide

System board
All system boards use the following part numbers:
xxxxxx-001: Non-Windows operating system
xxxxxx-601: Windows 10 operating system
Table 5-12 System board descriptions and part numbers
Description Spare part number
AMD Ryzen 7 3700U processor L78725-xx1
AMD Ryzen 5 3500U processor L78724-xx1
AMD Ryzen 3 3200U processor L78723-xx1
AMD Athlon 300U processor L78722-xx1
Before removing the system board, follow these steps:
1. Prepare the computer for disassembly (Preparation for disassembly on page 25).
2. Remove the bottom cover (see Bottom cover on page 26).
3. Remove the battery (see Battery on page 28).
4. Remove the solid-state drive (see Solid-state drive on page 31).
5. Remove the heat sink (see Heat sink (thermal module) on page 39).
Remove the system board:
1. Disconnect the following cables from the system board:
a. WLAN module antennas (1)
b. Speaker cable (2)
c. USB board cable (ZIF) (3)
d. Power connector cable (4)
e. Display cable (ZIF) (5)
f. Fan cable (6)
g. Keyboard backlight cable (ZIF) (7)
h. Keyboard cable (ZIF) (8)
i. Touchpad cable (ZIF) (9)
j. Fingerprint reader cable (ZIF) (10)
k. Card reader/audio board cable (ZIF) (11)
Component replacement procedures 41