Asus PN53-S1 Serie Manuel D'utilisation page 31

3. Remove the four (4) screws from the bottom cover (A), then push the
bottom cover towards the left to remove the bottom cover (B).
Replacing the bottom cover
1. Push the bottom cover from the left side towards the right side of
the Mini PC (A), then secure it using the four (4) screws removed
previously (B).
PN Series 31