Acer A315-53G Service Manual page 180

Attach the screw to secure the USB board to the upper case.
3.
NOTE: Screw torque force = 1.8~2.2kgf.cm
Connect the USB board FFC to the mainboard connector and secure the latch. Then attach the
4.
conductive tape to secure the USB board FFC in place.
Install the battery (see
5.
5-40
Figure 5-56. Securing the Screw
Figure 5-57. Connecting the USB Board FFC (2 of 2)
Battery Installation on page 5-34).
Service and Maintenance