Several months ago, we had to have a belt replaced in our refrigerator. The freezer drawer had to be removed to get to the belt. The repairman didn't align the freezer drawer and had to come back to correct it. When he did, the ice maker stopped working. Recently had another issue with a circuit board and the repairman said the ice maker needed replacing. I have replaced the icemaker, and still no ice. What could be the problem? Thank you for your help.