Acer ASPIRE 5252 Service Manual page 131

4. Place the mainboard in the chassis, left edge first to line up the I/O ports.
NOTE: Ensure the I/O ports are positioned correctly through the casing.
5. UMA: Replace the four (4) screws to secure the mainboard.
Discrete: Replace the one (1) screw to secure the mainboard.
Discrete
Step
Mainboard
(UMA Only)
Chapter 3
Size
M2.5*5 (red callouts)
M2.5*5 (green
callouts)
Quantity
1
3
UMA
Screw Type
121