Air conditioner electrical or Power Control Module

This is what happened. Months ago my air conditioner works fine, then the led lights on the buttons (air circulate, AC, directional buttons for your feet or defrost...ect) started to flickering on and off. When it flickered off the AC wasn't cooling but the air was still blowing, when the lights was on the AC cooled just fine. Eventually everytime the led lights would flicker off I would tap it with my finger and it would come on and stay on for a while. Now the light has not come back on and the AC does not cool and the heater does not work either. I was told it might be the Power Control Module but I don't know. I know that my AC and heater works fine, it has to do with the electric and the led lights associated with the buttons. Does anyone know what this is and what I need to do to fix it? I can take the front piece off but I was told if I unplug the radio I may need a code from the factory to get to work again when I plug it back in. can anyone give me some assistance or guidance? thanks Ken