Lenovo ThinkCentre M73 10B0 Hardware Maintenance Manual page 174

2. Remove the computer cover. See "Removing the computer cover" on page 136.
3. Remove the front bezel. See "Removing and reinstalling the front bezel" on page 136
4. Pivot the drive bay assembly upward. See "Accessing the system board components and drives" on
page 137.
5. Remove the hard disk drive for easier access to the front fan assembly. See "Replacing the hard
disk drive" on page 144.
6. Note the cable routing and disconnect the front fan assembly cable from the system fan connector
on the system board.
Note: For easier access to the system fan connector on the system board, you might need to remove
the heat sink fan duct. See "Replacing the heat sink and fan assembly" on page 157.
7. The front fan assembly is attached to the chassis by four rubber mounts. Remove the front fan assembly
by breaking or cutting the rubber mounts and gently pulling the front fan assembly out of the chassis.
Note: The new front fan assembly comes with four new rubber mounts attached.
Figure 114. Removing the system fan assembly
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ThinkCentre M73 Hardware Maintenance Manual