Lenovo IdeaCentre D400 Series Hardware Maintenance Manual page 51

5. Remove the four screws on the power supply (1).
6. Slide the power supply module out of the bay (2), as shown.
7. Slide the new power supply module into the bay.
8. Secure the new power supply to the home center with four screws.
9. Reconnect the three power cables to the hard disk drive backplane and the
10.Slide the system board tray into the chassis.
11.Replace the front bezel. Refer to step 7 of the "Replacing the front bezel".
12.Refer to "Completing the installation".
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(4) Press down on the tab on the 24-pin power cable (1) and pull the cable
out (2).
system board.
Chapter 7. Replacing hardware