Lenovo Ideapad E490 - Appendix A. Notices; General Product and Licensing Notices

Removal steps of the short hinge kit
Step Screw (quantity) Color
Torque
1
M2.5 × 2.5 mm, flat-head, nylon-coated (6)
Black 0.294 Nm
(3.0 kgf-cm)
86 E490 and R490 Hardware Maintenance Manual