Acer A315-53G Service Manual page 228

Attach the two (2) screws M 2.0 x 4.0 (marked with red-white circle) and the screw M 2.5 x 3.0
2.
(marked with blue-white circle) to secure the mainboard to the upper case.
NOTE: Screw torque force:
M 2.0 x 4.0 = 1.8~2.2kgf.cm

M 2.5 x 3.0 = 1.8~2.2kgf.cm

5-88
Figure 5-136. Securing the Screws (Discrete)
Figure 5-137. Securing the Screws (UMA)
Service and Maintenance