Over-the-range LG microwave surface lights (cooktop lights) do not work or are stuck on one brightness.

Safety: Unplug the microwave before replacing bulbs.

Steps:

• Access bulbs: Remove the bottom lamp cover screws to access the cooktop bulbs.
• Replace bulbs: Install new bulbs of the exact type and wattage specified by LG (often halogen or incandescent appliance bulbs).
• Test brightness: Plug in and test LOW/HIGH settings. If bulbs work but brightness does not change, the control board lamp relay or dimming circuit may be faulty.

Control board-related light issues require professional diagnosis and repair.