i have a broken microwave for which i need to replace a door switch, i need to remove the microwave from the wall to do this... the microwave has controls (that work for the oven only) that control the oven, so am assuming there is an attachment between the two... once i remove the trim from surrounding the microwave, how can i remove it from the attached oven making sure i don't break the oven control? most instructions i find pertain to a detached microwave, but this one is a built in microwave/oven wall combo.