While we were cooking on the front left small burner we heard a pop, and then smelled an electrical burning smell that only lasted for a few seconds. Now the burner will not turn off. The knob has no power to the small burner side. We can turn the knob to turn on the large front left burner off and on and it works. All other knobs work as well as the clock and oven. How or what needs to be done to fix it. Any help is greatly appreciated.