Lenovo ThinkCentre M57 6086 Hardware Maintenance Manual page 150

6. Pull on the tips of the rubber mounts until the fan assembly is in place.
7. Route the fan cable to the system board and connect the cable to the system
board. See "System board connectors" on page 116.
8. Replace the front bezel.
9. Go to "Completing the FRU replacement" on page 112.
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Hardware Maintenance Manual