Lenovo D400 Desktop IdeaCentre - Manual (Page 46)

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Hardware Maintenance Manual
3. Remove the four screws (1) that secure the fan to the home center chassis.
4. Remove the fan (2) from the home center.
5. Align the four screw holes on the new fan to the four mounting holes on the
home center chassis.
6. Secure the new fan with four screws.
7. Reconnect the fan cable to the hard disk drive backplane.
8. Refer to “Completing the installation”.