GE Monogram Water and Ice Will Not Dispense

WE have a GE Monogram refrigerator. We cannot get the water or ice to dispense. It was not making ice either. The water valve, main board and the board on the freezer door all were replace.

When the board and water valve were replaced the icemaker started to work. We have traced everything and we cannot find the problem. What can it be. The fridge is in great shape otherwise and it cost a great deal of money to give up on it. Thank you in advance for your help