Lenovo ThinkCentre 7258 User Manual page 136

10. Reconnect all the power supply assembly cables to the drives and the system
11. Go to "Completing the FRU replacement" on page 151.
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Hardware Maintenance Manual
5. Disconnect the power supply assembly cables from all drives and from the
power connectors.
6. Remove the power supply assembly cables from the cable clips and ties.
7. Slide the power supply assembly away from the chassis and remove it from
the computer.
8. Install the new power supply assembly into the chassis so that the screw holes
in the new power supply assembly align with those in the chassis.
9. Install and tighten the four screws at the rear of the chassis to secure the
power supply assembly.
Note: Use only the screws provided by Lenovo.
board.