When you look from the top. You see the control panel.
Then you see a metal cover just be hind. You will see a tear drop shaped black shape.Held down with two bent tabs.thats the light.the one in the middle is the grill.
gordju, August 2010
You have to squeeze the two pegs that hold the bulb holder in place and lift it out from the top of the microwave. If you follow the black & red wires to their connectors, this is the bulb holder.