Lenovo ThinkCentre 7244 Hardware Maintenance Manual page 124

5. Disconnect the power supply cables from the power connectors
Note: You might need to remove the hard disk drive for easier access to the power connector
See "Replacing the hard disk drive" on page 122.
Figure 50. Power connectors on the system board
6. Remove the power supply cables from the cable clips and ties.
7. Slide the power supply away from the chassis and remove it from the computer.
Figure 51. Removing the power supply
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ThinkCentre Hardware Maintenance Manual
1 and 2 and from all drives.
2 .