Use this guide to replace the back cover.
Remove the two 6.2mm Phillips screws on both sides of camera's back cover.
Remove the two 6.2mm Phillips screws on the bottom back cover of the camera.
Back cover is now unscrewed an can be removed.
Unscrew the 6.2mm Phillips screw next to the viewfinder.
The back cover is now unscrewed. Lift up and pull the cover off evenly.