Acer A315-53G Service Manual page 210

Firmly push down the hall sensor board into its slot until it is fully seated.
3.
Connect the hall sensor FFC to the mainboard connector and secure the latch.
4.
Install the battery (see
5.
5-70
Figure 5-106. Installing the Hall Sensor Board (2 of 2)
Figure 5-107. Connecting the Hall Sensor FFC (2 of 2)
Battery Installation on page 5-34).
Service and Maintenance