Difficulty

Turn to the back side of the unit, and unscrew the screws pictured below. This will allow you pop off the top panel.
With the top panel off, turn to the front and use your socket wrench to remove these screws.
This panel should come off along with the upper hinge pin freeing up the door.
Remove and replace the door that now sits on the bottom hinge.
Mate the hinge hole of the door to the pin of the bottom hinge.
Place back the panel removed from step 3. Make sure the top pin is inserted in the top hinge hole of the door.
Use your socket wrench to tighten the screws.
Place the top panel and screw it back on using your Phillips driver.