3Open the power supply cover by removing the two screws that secure it in place, then swing the cover up.

4Holding the sides of the power supply, push it out through the back panel of the chassis.

5Insert the new power supply through the back panel, making sure that the connectors on the power supply seat firmly in the connectors on the power distribution board.

6Close the power supply cover and replace the screws you removed in Step 3.

7Close the case. (See “Closing the case” on page 20.)

8Reconnect the power cord and all external peripherals, then turn on the system.

52Replacing and Adding Internal Devices