Tyan Computer GX21 - Manual (Page 58)

3.10 Replacing the Cooling Fans
50 Chapter 3: Replacing Pre-Installed Components
Note: To lift the fan assembly clear of the
chassis, you may find it necessary to remove
the plastic cable ties which secure the fan
cables.
2. Remove the 2 screws which secure the cooling fan
bracket to the chassis.
3. Lift the cooling fan assembly from the chassis.