Lenovo 10B0 Maintenance Manual page 168

7. At the rear of the computer, remove the three screws that secure the power supply assembly. Press the
retaining clip 1 downward and slide the power supply assembly to the front of the computer. Then, lift
the power supply assembly out of the computer.
Figure 106. Removing the power supply assembly
8. Ensure that the new power supply assembly is the correct replacement.
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ThinkCentre M73 Hardware Maintenance Manual