Unplug the microwave or remove the power at the circuit breaker.
Remove the two screws holding the grille above the oven in place and pull it off the oven.
Slide the charcoal filter, if one is present, to the left and pull forward to remove.
Pull the lamp shield out of the oven after removing the screw holding it in place.
Pull out the burned-out bulb and push in the replacement.
Screw the shield back in place, re-insert the charcoal grille and screw the front grille back in place. Reconnect the power to begin using the oven.
Unplug the microwave or remove the power at the circuit breaker.
Remove the screw holding the light cover to the underside of the oven.
Let the cover hang down and pull the dead bulb out of its socket.
Push a replacement bulb into the socket, lift the cover and tighten the screw back in place. Reconnect the power to begin using the oven.