9.Install the new power supply into the chassis so that the screw holes in the power supply align with those in the chassis.
Note: Use only the screws provided by IBM.
10.Install and tighten the four screws at the rear of the chassis that secure the power supply.
11.Reconnect the speaker wire to the system board.
12.Reconnect power supply connectors to the system board.
13.Reconnect power supply connectors to the hard disk drive and
14.Correctly route all power supply cables to avoid interference with the drive bay assembly, and fold the ribbon cables 1 and 2along the existing crease lines.
Attention
Keep cables 1 through 3 clear of the hinges and sides of the computer chassis.
15.Close the cover and reconnect the external cables . Go to “Completing the installation” on page 19.