Lenovo ThinkPad Edge E420s Hardware Maintenance Manual page 70

Removal steps of top case assembly
Step Screw (quantity)
1
M2 × 3 mm, wafer-head, nylon-coated (8)
2
M2 x 2 mm, wafer-head, nylon-coated (1)
Note: Screw 2 is located under the hard disk drive, you have to remove the hard disk drive first to remove
screw 2 .
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Hardware Maintenance Manual
Torque
Color
Black 0.181 Nm
(1.85 kgfcm)
Black 0.181 Nm
(1.85 kgfcm)