Sony P C V- 7 7 6 7 Personal Computer User Manual

Sony VAIO Desktop User Guide
Upgrading your VAIO computer
5 Position the main unit so the back panel is facing you.
6 Locate the tab on the upper right side of the rear panel, and pull it back until the side cover releases.
7 Lift the side cover away from the unit and set it aside.
Always wait for the internal parts of the system unit to cool down before removing the side panel.