Lenovo ThinkPad T420 4177 Hardware Maintenance Manual page 92

Table 19. Removal steps of palm rest or palm rest with fingerprint reader
Step Screw (quantity)
1
M2 × 5 mm, flat-head, nylon-coated (13)
2
M2.5 × 5 mm, flat-head, nylon-coated (2)
3
M2 × 3 mm, flat-head, nylon-coated (1)
Step Screw (quantity)
4
M2 × 5 mm, flat-head, nylon-coated (3)
84
Hardware Maintenance Manual
Torque
Color
Black 0.181 Nm
(1.85 kgfcm)
Black 0.181 Nm
(1.85 kgfcm)
Silver 0.181 Nm
(1.85 kgfcm)
Torque
Color
Black 0.181 Nm
(1.85 kgfcm)