Hello, kitchen and appliance experts! I have an interesting case I'm hoping you can help me solve.

I own an old (not sure how many years) Amana Self-Cleaning Electric Range, Model: ARR630. One day recently the display just blanked out and the oven locked itself. It then unlocked itself after a few minutes. My wife and I reset the circuit breaker and, to this day, it does the same thing. Nothing appears on the display and, if we keep the circuit "On" the oven locks itself.

Is this something I might be able to fix, or do I need to call a repair service? The owner's manual doesn't reference this issue in its "Troubleshooting" section.

Thanks for any help you can give!