Lenovo T420 - Manual (Page 95)

When installing: Make sure that the connector is attached firmly.
Removal steps of SmartCard dummy spacer
Some models have a SmartCard dummy spacer as a miscellaneous part. For those models, remove the
spacer as shown:
1
1
2
Step Screw (quantity) Color Torque
1 M2 × 3 mm, wafer-head, nylon-coated (2) Black 0.181 Nm
(1.85 kgfcm)
Chapter 8 . Removing and replacing a FRU 89