Table 5-12 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
Models with UMA graphics memory:
Intel Core 7-1255U N20294-xxx
Intel Core i5-1235U N20293-xxx
Intel Core i3-1215U N20292-xxx
Models with discrete graphics memory:
Intel Core i7-1255U with NVIDIA GeForce MX550 graphics adapter N20296-xxx
Intel Core i5-1235U with NVIDIA GeForce MX550 graphics adapter N20295-xxx
Before removing thesystem board, follow these steps:
1. Prepare the computer for disassembly (see Preparation for disassembly on page 30).
2. Remove the bottom cover (see Bottom cover and rubber feet on page 30).
3. Remove the battery (see Battery on page 32).
4. Remove the solid-state drive (see Solid-state drive on page 35).
5. Remove the memory modules (see Memory modules on page 33).
6. Remove the WLAN module (see WLAN module on page 36).
7. Remove the fan (see Fan on page 42).
NOTE: You do not have to remove the heat sink to remove the system board.
Remove the system board:
1. Disconnect the following cables from the system board:
● Power connector cable (1)
● Left fan cable (2)
● Display cable (ZIF) (3)
● Speaker cable (4)
● Keyboard cable (ZIF) (5)
● Backlight cable (ZIF) (6) (select products only)
● Touchpad board (ZIF) (7)
● Hard drive cable (ZIF) (8)
System board
47
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