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So unfortunately there is no reset on the microwave. There are 3 fuses however that cut power to the entire microwave. Below is a link to a diagram for the parts breakdown so you can see what parts I'm talking about. You will need to un-install the microwave and remove the outer shell to access all the fuses I'm afraid.
Part 114 is a noise filter board which has an inline fuse clipped into it so if the fuse is bad, you can pick up a new one and replace it. Part 61 is a cavity thermal fuse which is the size of a dime and mounted to the top above the microwave cavity and that fuse blows if something caught on fire inside the microwave or the microwave was run too long, or possibly if the microwave was run without any food inside. The last fuse is part 74. That is your magnetron thermal fuse. If this part is open and has no continuity through it, then you need to replace this fuse as well as the magnetron which is part 73.
CLICK HERE for diagram
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