Asus RS120-E4/PA4 - Manual (Page 36)

Chapter 2: Hardware setup 2-20
To uninstall the system fans:
1. Disconnect a system fan cable from
the fan connector on the backplane
board.
To reinstall the system fan:
1. Insert the fan to the fan cage. The
airflow directional arrow on the
fan side should point towards the
system rear panel.
2. Connect the system fan cable to
the fan connector on the backplane
board.
2. Lift the fan, then set aside.
3. Repeat step 1 to 2 to uninstall the
other system fans.