Sometimes you need four hands to replace the cabinets on these machines. Look closely at the base of the chassis. You'll see two tabs that should be vertical, on each side. You start with the cabinet hooking the chassis from underneath. Tilt it down onto the tabs; you sometimes need to squeeze in gently on the sides to get the tabs to line up with the slots in the cabinet. Make sure that the grey or white strips on the back panel are flat, with the "T" flat against the cabinet and panel. Hook the clips in the rear of the slots, and push firmly with the palm of your hand, or push the front of the clips with a large flat-tipped screwdriver. They'll snap back into place.