IBM System x3650 M4 BD Type 5466 Installation And Service Manual page 241

9. After removing the safety cover, you can see the upper power supply card
and lower power-supply paddle card.
Figure 138. Upper power supply card and lower power-supply paddle card
10. Make note of where the cables between the upper power supply card and
lower power-supply card are connected; then, disconnect them.
11. Make note of which cables are attached to the lower power-supply paddle
card then, disconnect them.
12. Make note of where the cables between the lower power supply card and
system board are connected; then, disconnect them from the system board.
Attention: When disconnecting the power cable connector from the system
board, do not grab the wires. Please grab the middle connector to vertically
remove the power cable connector from the system board.
13. Remove the screws that secure the lower power-supply card to the chassis.
14. Lift the lower power-supply card out of the server.
Chapter 6. Removing and replacing components
225