I have a Whirlpool bottom freezer MD# GB2SHDTB00. We replaced the main control board, since this refrig does not have a mechanical cold control or timer to check and still the refrigerator won't do anything except for the lights coming on,the compressor and fans will not come on.What else should I check? Outlets and power are good. I read in another forum something about a code to enter, does this mean anything to anyone? This is just a mother board, I don't know where you would enter a code.