GE XL44 oven control, clock, timer are out

out of the blue, my oven controls, clock and timer are blank so I cannot set them. the nightlight works (there is a rocker switch that works fine) but that’s not too helpful for baking.

Ground is good and the circuit breaker never tripped. The stovetop works fine - all four burners work. I am thinking a circuit board went bad (unless there is a fuse or something like that in there). Any thoughts/advice how to trouble shoot an otherwise perfectly good Stove/oven?

thanks
Lisa

btw my model # is JGBP80MEV4BC - when I look up the control board for this model it says that GE no longer makes it. Is there another control board that will work or is it possible to get the control board from an aftermarket supplier? It seems like a waste of money to have to buy a whole new Range. (which I don’t want to do)