I have an old model (here when I bought the apartment) it has a touchpad and an led temp display. The circuit board for the control panel appears to have failed and the oven won't heat (the element is fine) The fan works, the grill works but the oven temp display sits at 70C and doesn't warm up. Can I reset the panel somehow (I noticed there are spots on the touchpad that don't indicate a button, but trigger something like a panel test).