"Remove the I/O board" on page 37
"Remove the battery pack" on page 40
Step 1.
Peel off the system board cable mylar.
Figure 22. Peel off the system board cable mylar
Step 2.
Disconnect the camera cable, speakers cable, touchpad cable, keyboard cable, and EDP cable
from the system board. Disconnect I/O board cable from I/O board.
Figure 23. Disconnect all the cables
Step 3.
Remove five screws and remove the system board.
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Lenovo Legion 5i (16", 9)Hardware Maintenance Manual