Both ovens working perfectly top convectioning at 350, bottom baking at 380. Food was finished, turned both off and whole oven went dead. Has power to oven and measures120V on both hots and 120V at control board input. Have old control board from same oven, previous repair top oven would not cause cooling fan to run. Put in that board and all is still dead which makes me think it is something else hopefully??? Where to look next?

thank you!!!!