OptiPlex 7490 All-In-One Service Manual

Installing the power-supply unit (PSU)

If you are replacing a component, remove the existing component before performing the installation procedure.

The following image indicates the location of the PSU and provides a visual representation of the PSU installation procedure.

Image: Installing the power-supply unit (PSU)

Align and place the PSU in the slot on the display-assembly base.
Replace the screw (M3x5) to secure the PSU to the display-assembly base.
Connect the power-supply cable to the connector on the system board.
Route the power-supply cable through the routing guides on the rear-I/O bracket and PSU fan.
Align the screw hole on the power-supply socket with the screw hole on the rear-I/O bracket, and place it in the slot on the rear-I/O bracket.
Replace the screw (M3x5) to secure the power-supply socket to the rear-I/O bracket.