I know, this is ancient but i love it because it is an old Buick in disguise (lots of chrome).
The display/control module has gone completely dead but it is not the module itself. However, the Light switch does operate the light in the cooking cavity so the module is getting 120VAC. I have an old rusty RR-10 in the garage for testing purposes and the module works in that one. So..... what would cause the module to do this? Is there a safety device in the oven itself that could go bad and cause this condition?