Lenovo 10AU User Manual page 68

6. At the rear of the computer, remove the three screws that secure the power supply assembly. Press the
power supply clip 1
assembly to the front of the computer. Lift the power supply assembly out of the computer.
Figure 38. Removing the power supply assembly
7. Make sure that the new power supply assembly is the correct replacement.
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ThinkCentre E73 User Guide
downward to release the power supply assembly and then slide the power supply