The power supply wire that leads to the control board from the power cord terminal block has an in-line fuse in it. You can get to the fuse by removing the oven cover wrap, and tracing the wire to the fuse holder. It's located in the control area behind the control board. You can get replacement fuses at any good hardware store.
If my answer helps you, please click on the 'accept' button. That's how we experts are paid for our efforts.