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There is not a circuit breaker inside the oven or a reset whatsoever that will cut power to the oven. If you're certain that there is power getting to the oven. The part is incredibly expensive at about $500 and the part number is ***** if you needed to replace it. I would try to flip the breaker off for 5 minutes if you haven't tried that already to see if the board will reset---but if not then the board will need to be replaced.
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