Lenovo MT 1871 Hardware Maintenance Manual page 106

Removing and replacing a FRU
For models with M9-32 or M10 GL-128 video chip:
For models with M7-32 video chip:
Step Screw (quantity)
7
M2 × 12 mm, bind-head,
nylon-coated (2)
(continued)
102
R50/R50p, R51 Series
8
8
7
7
Color Torque
Black 0.245 Nm
(2.5 kgfcm)