Lenovo ThinkStation 2551 Hardware Maintenance Manual page 154

6. Pivot the optical drive upward and disconnect the power supply assembly cables from all drives and
from power connectors
Figure 83. Power connectors on the system board
Note: You might also need to release the power supply assembly cables from some cable clips or ties
that secure the cables to the chassis. Ensure that you note the cable routing before disconnecting
the cables.
7. 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 84. Removing the power supply assembly
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ThinkStation Hardware Maintenance Manual
1 , 2 and 3 on the system board.
downward to release the power supply assembly and then slide the power supply