2.
Turn the 4 screws anticlockwise to loosen them.
Screws
3.
Pull the release lever in the direction of the arrow to disconnect the PSU from the back board.
Release Lever
4.
Replace the PSU.
New PSU
5.
Follow the steps in "Installing the Power Supply Unit".
Document Version 2011-10
Back Board
Current PSU
3.2.4 Installing/Replacing the Power Supply Unit
Installation Manual
57