Microwave interior light does not turn on when door opens or during cooking, but unit heats normally.

Safety first: Unplug the microwave before replacing the bulb. Avoid touching internal high-voltage components.

• Access lamp: On many Danby countertop models, the lamp is accessed by removing the outer cabinet or a small service panel. Refer to your model's manual.
• Replace bulb: Remove the old bulb and install a new one of the exact same type, wattage, and base specified by Danby. Do not substitute automotive or household bulbs.
• Check socket: Inspect the lamp socket for burns or looseness. If damaged, the socket assembly may need replacement.
• Next step: If a new bulb does not light, the control board lamp relay or wiring may be faulty. This requires further diagnosis by a technician.