I replace the burned out light bulb yesterday. When I screwed in the new bulb, there was a flash and a pop and now the panel is blank and the door is locked. Range top works fine. From other posts, oven seems to think that it is too hot and so door is locked, etc. Unplug the unit and plug in again: door lock clicks. One person said the thermal fuse fixed the problem, but mine is too old, I think. Is the interlock switch or solenoid my problem? Any help would be greatly appreciated, since my husband is out of town and it is time to bake Christmas cookies!! :-) Thanks! Laura