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If the bulb is definitely good, you'd need to test power at the light receptacle, and it should be 110 volts between the 2 wires. If you don't have 110 volts going to the receptacle between the 2 wires, you'll need to order and replace the main control board. If you do have 110 volts between the 2 wires, you'll need to replace the bulb receptacle.
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