GE Range Display Dead

I have this range at my second home, so it only gets used on weekends and holidays. Last Friday when I got there the display on the range was not lit up.

I pressed different areas on the touchscreen and it did not beep or light up.

The rotary knobs on the panel still allow functionality of the cooktop, but the oven controls will not work. I unplugged the range for about half an hour, hoping that would trigger a reset. No such luck.

I hate to just blindly start buying and replacing control boards, so any help or suggestions based on experience would be greatly appreciated.