Dell OptiPlex 9020 (Mid 2013) - Manual (Page 25)

c) front bezel
d) cover
4. Follow the procedures in After Working Inside Your Computer .
Removing the System Fan
1. Follow the procedures in Before Working Inside Your Computer .
2. Remove:
a) cover
b) front bezel
c) drive cage
3. Disconnect the system-fan cable from the system board.
4. Remove the screws that secure the fan to the chassis.
5. Remove the fan from the chassis.
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