System board
All system boards use the following part numbers:
xxxxxx-001: Non-Windows operating system
xxxxxx-601: Windows 10 operating system
Table 6-8 System board descriptions and part numbers
Description Spare part number
AMD Ryzen 7 3750H processor and 6 GB of discrete graphics memory (GeForce GTX 1660 Ti) L71932-xx1
AMD Ryzen 7 3750H processor and 4 GB of discrete graphics memory (GeForce GTX 1650) L71930-xx1
AMD Ryzen 5 3550H processor and 6 GB of discrete graphics memory (GeForce GTX 1660 Ti) L71931-xx1
AMD Ryzen 5 3550H processor and 4 GB of discrete graphics memory (GeForce GTX 1650) L71929-xx1
AMD Ryzen 5 3550H processor and 3 GB of discrete graphics memory (GeForce GTX 1050) L71928-xx1
Before removing the system board, follow these steps:
1. Prepare the computer for disassembly (Preparation for disassembly on page 27).
2. Remove the bottom cover (see Bottom cover on page 28).
3. Disconnect the battery (see Battery on page 37).
4. Remove the hard drive (see Hard drive assembly on page 33).
5. Remove the fans (see Fans on page 41).
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 module on page 31)
● Solid-state drive (Solid-state drive on page 30
● WLAN/Bluetooth module (WLAN module on page 38)
● Heat sink (Heat sink on page 42)
Remove the system board:
1. Disconnect the following cables from the system board:
(1) WLAN module antennas
(2) Speaker cable
(3) Power connector cable
(4) Power button/USB board cable (ZIF) (from power button/USB board)
(5) Release the power button/USB board cable from adhesive to chassis
(6) Display cable (ZIF)
(7) Touchpad cable (ZIF)
(8) Keyboard backlight (ZIF)
(9) Keyboard cable (ZIF)
Component replacement procedures 45
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