https://youtu.be/1ngqB4mxZOI?si=a-ispgR7Os__OhgYLooks like the same control board on our Smeg DOA330X1 double oven.
We had the F03 error but a different cause. In our case, during the power-on doorlock test, the oven was failing to detect the door as closed because of an intermittent door switch. When we get the F03 error now we repeatedly activate the door switch by hand until the oven light comes back on. We only worked that out after paying $$$ to have the control board replaced. We kept the old control board and found a high ESR capacitor so decided to re-cap the whole board and keep as a spare.