Lenovo ThinkCentre M73 User Manual page 72

8. Install the new power supply assembly into the chassis so that the screw holes in the new power supply
assembly are aligned with the corresponding holes in the rear of the chassis. Then, install the three
screws to secure the new power supply assembly in place.
Note: Use only screws provided by Lenovo.
Figure 43. Installing the power supply assembly
9. Connect the new power supply assembly cables to all drives and the system board. See "Locating
parts on the system board" on page 13.
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ThinkCentre M73 User Guide