We had a power outage at the house, and after the power came back on, we noticed that the green lights on the control panel above the dispenser were not working. An the cooling wasn't active anymore even though the lights in the fridge and freezer would come on when you opened the door. Power wasn't getting to the dispenser board, so I replaced the main control board in the back of the unit. Fairly easy job, although I did have to cut a splice the ground wire connection on the new board with the old board's connector.