adj. 1  wide; of great breadth:The Mississippi River is its broadest at this point. [ 2 after a noun of measurement] measured from side to side: three feet broad. 3  open; full;  not limited or narrow; extensive:Our teacher has a broad range of 1  interests. [before a noun] general: in the broad sense of the term.  plain or clear;
To replace the relay bord you have to uninstall the entire oven and remove the screws coming in from the top panel. Remove the top panel and then you'll see the relay board and you ca replace it. There is no way to jsut replace the relay control board from the front.
In this video, This Old House general contractor Tom Silva shows how to install a wall-mounted microwave oven with ducted fan hood. Steps: 1. Use the manufacturer's template to mark cutout lines onto the wall. 2. Cut through the drywall using an oscillating multi-tool. 3. Pull the insulation from within the hole. 4. If there's a wall stud in the way, enlarge the hole in the drywall and cut out the stud with the oscillating multi-tool.