1. Remove the left side panel from the case.
2. Remove the PSU from case by removing the 4 Screws in rear of case.
3. Move the PSU forward until you can see the right side panel on inside of case.
4. Locate the metal slide bar that holds the right side panel to the case.
5. Using a finger or flat head screw driver, slide the bar downward and the door will be unlatched.