Besidees all the stuff you read, is there frost on the back inside wall of the freezer? If so, it could be another ADC board failure or even a defrost heater/thermostat problem. Not the condenser fan.
Remove the 2 screws holding the back wall of the freezer and look. If there's ice all over the coils, the FF side will not cool down. You must use an OHM meter to test the defrost heater and thermostat by unhooking the 3-wire harenss and checking continuity thru the 3 wires. Expect to read about 2.25 Ohms if the heater is good. Actually any reading above 2 is good, as long as the circuit is not open. If it is open, replace the heater and thermostat only. If it shows continuity, the board has failed once again.
A good surge protector on back of the unit might help prevent future repeat episodes of board failure.