Microwave interior light does not come on, but the unit heats and operates normally.

Safety first: Unplug the microwave before accessing the lamp area. Avoid touching high-voltage (HV) components.

Step-by-step checks:

• 1. Access lamp: On many Daewoo models, the lamp is accessible by removing the outer cabinet or a dedicated lamp cover.
• 2. Inspect bulb: Check if the filament is broken or the bulb is darkened. Replace it with the exact type and wattage specified by Daewoo.
• 3. Check socket and wiring: Ensure the lamp is seated firmly and that the wires are not loose or burned.
• 4. Test operation: Reassemble, plug in, and test. If the new lamp does not light, the control PCB lamp relay or wiring may be faulty and require professional service.