Table 6-12 System board descriptions and part numbers
Description Spare part
number
System board (includes processor):
All system boards use the following part numbers:
xxxxxx-001: Non-Windows operating system
xxxxxx-601: Windows 10 operating system
AMD Ryzen 7 PRO 4750U M30644-xx1
AMD Ryzen 7 PRO 4750U (WWAN models) M30645-xx1
AMD Ryzen 7 4700U M30640-xx1
AMD Ryzen 7 4700U (WWAN) M30641-xx1
AMD Ryzen 5 PRO 4650U M30642-xx1
AMD Ryzen 5 PRO 4650U (WWAN models) M30643-xx1
AMD Ryzen 5 4500U M30638-xx1
AMD Ryzen 5 4500U (WWAN) M30639-xx1
AMD Ryzen 3 4300U M30636-xx1
AMD Ryzen 3 4300U (WWAN models) M30637-xx1
Before removing the system board, follow these steps:
1. Prepare the computer for disassembly (Preparation for disassembly on page 31).
2. Remove the bottom cover (Bottom cover on page 31).
3. Remove the battery (see Battery on page 38).
4. Remove the fan (see Fan on page 48).
When you replace the system board, be sure to remove the following components (as applicable) from the
defective system board and install them on the replacement system board:
● Memory modules (see Memory modules on page 32).
● WLAN module (see WLAN module on page 39).
● WWAN module (see WWAN module on page 41).
● Solid-state drive (see Solid-state drive on page 35).
● Heat sink (see Heat sink on page 49).
Remove the system board:
1. Disconnect the following cables from the system board:
● Power connector cable (1)
● Camera cable (2)
● Antenna cables from the WWAN module (select products only) (3)
● Larger USB cable from the USB board (ZIF) (4)
Component replacement procedures 51
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