With help from the Appliance Parts Pros video, I bought and replaced the entire control panel.
I had never done anything like this before. So I had my doubts that I would be successful. I reviewed the video a couple of times, laid out the simple tools, and got to work. In less than 90 minutes, the installation was complete, and everything worked perfectly once I plugged in the stove. I have since baked 3 loaves of bread to celebrate being able to use the oven again! Thank you Appliance Parts Pros for turning me into a competent repair woman at last!