Lenovo V480s Hardware Maintenance Manual page 66

Remove the screws 4 and then remove the I/O board in the direction shown by the arrow
Step Screw (quantity)
4
M2 × 5 mm, flat-head, nylon-coated (2)
Remove the DC-in cable in the direction shown by the arrow
60
Hardware Maintenance Manual
Color
Black
5 .
5 .
Torque
1.85 kgf-cm