Microwave over-the-range surface lights under the unit do not work or only one brightness level works.

Safety First: Unplug the microwave or switch off the breaker.

Steps:

• Replace bulbs: Remove the lens cover under the microwave and replace the bulbs with the correct Frigidaire surface light bulbs (check wattage and base type).
• Check sockets: Inspect sockets for burning or looseness.
• Brightness issue: If only one brightness level works, the control board's dimming circuit or relay may be faulty and require replacement of the main control board.