Lenovo 20Y700DGIX Hardware Maintenance Manual page 83

Removal steps of the I/O board and I/O board cable (E15 Gen 3)
For access, remove these FRUs:
• "1010 Base cover assembly" on page 66
• "1070 Thermal fan assembly" on page 74
Step Screw (quantity)
1
M2.5 × L6 mm, flat-head, nylon-coated (3)
Color Torque
Black 0.294 Nm
(3.0 kgf-cm)
.
Chapter 8 Removing or replacing a FRU
77