Lenovo B490 Notebook - Manual (Page 58)

Removal steps of keyboard
Remove the screws 1 .
1
1
1
When installing: Ensure that the screws have been fastened to secure the keyboard.
Step Screw (quantity) Color Torque
1 M2.5 × 8 mm, flat-head, nylon-coated (3) Black 4.0 kgf-cm
Push hard in the direction shown by the arrow 2 to unlatch the front side of the keyboard.
2
When installing: Ensure that the keyboard connector is attached firmly.
52 Hardware Maintenance Manual