Lenovo T420i manual For Discrete Graphics models, 1a 1d 1c 1b

1a

1d

1c

1b

Step	Screw (quantity)	Color	Torque
	Capture shoulder screw (4)	Silver	0.181 Nm
1
			(1.85 kgfcm)
	M2 × 3 mm, wafer-head, nylon-coated (1)	black	0.181 Nm
2
			(1.85 kgfcm)

For Discrete Graphics models:

3

4

98ThinkPad T420 and T420i Hardware Maintenance Manual