Discontinue the power going to the GE JKP67 Cooking Center. Turn off the circuit breaker in the electrical panel or remove the main fuse.
Locate the glass cover over the light bulb on the inside of the microwave. Take the door off, if you cannot easily reach the light fixture.
Place your hand under the cover to catch it before it falls. Use your fingers to push back the ball-shaped wire that holds the glass cover in place until it releases the cover.
Lift and remove the cover. Unscrew the light bulb and replace it with a new bulb.
Put the glass cover back in place over the light bulb. Pull the ball-shaped wire forward until you hear it snap in place.
Connect the power back up to the GE JKP67 Cooking Center.