Installing The Power Supply Unit (Psu) - Dell OptiPlex 7440 Owner's Manual

5. Perform the following steps as shown in the illustration:
a. Remove the screw that secure the PSU to the chassis [1].
b. Slide the PSU and lift it away from the chassis [2].

Installing the Power Supply Unit (PSU)

1. Place the PSU on the chassis.
2. Tighten the screw to secure the power supply unit to the chassis.
3. Tighten the screw to secure the power supply socket to the chassis.
4. Thread the power-supply cable on the retention-hooks in the chassis.
5. Connect the power-supply cables to the connectors on the system board.
6. Install the:
22