Control Panel is blank

I just bought a house with a 30" electric built in Jenn-air oven with convection. The control panel does not light up at all although the oven does heat. I was told a capacitor replacement will solve the problem. I need a schematic for this oven but Jenn-air only has repair manuals. Does this sound like the right solution? Does anyone know where I can get a schematic for this model?