I followed troubleshooting guide and repair videos offered on website, ordered replacement oven control board and reinstalled unit using only a 1/4 inch nut driver. Easy fix for do it yourselfer in 15-20 minutes. Make certain to have model number of appliance when ordering. Parts are somewhat pricey but AppliancePartsPros. were much more reasonable than local parts supply houses or other sources plus they offered 1 year replacement even on electrical stuff.