top heating grills works fine. top burners work fine. It started like a virus, at 1st some buttons wouldn't work like clean, rapid preheat, settings, fan hi/low, few days later to all display modes including bake. That is all button on the left side, the button on right side (numbers) wont even beep except for the number 7. I tried shutting oven power off and waited a few minutes then I turned back on but now it shows default time and "power loss" not sure what that means. any suggestions???