Lenovo E470 Hardware Maintenance Manual page 89

Removal steps of the base cover assembly
Remove the screws in the alphabetical order as shown.
Step Screw (quantity)
1
M2.5 × 4.0 mm, flat-head, nylon-coated (4)
Color Torque
0.392 Nm
Silver
(4.0 kgf-cm)
.
Chapter 9 Removing or replacing a FRU
83