Dell INSPIRON Inspiron 9100 Owner's Manual page 112

4
Remove the screw on the fan and lift up the fan release lever.
5
Use the fan release lever to lift the fan out of the computer.
When replacing fan 2, press down on the fan surface labeled "Press here" to securely seat the fan
in place.
To remove fan 3:
1
Unscrew the two captive screws labeled "F3."
2
Lift the fan out of the computer.
NOTE:
112
Adding and Replacing Parts
fan release lever
fan
The cover on this fan is not removable. It remains attached to the fan.
screw