Replaced ice maker and repaired water dispenser hose one week ago. Had to have technician replace compressor relay switch 4 days ago. Everything worked well for 3 days, then the lights on the control panel of the freezer went off. Now the ice maker will not dump ice into the bin; the ice dispenser from the bin will not work; the water dispenser will not work. I have been told that I may have a broken wire or a bad dispenser board. How do I diagnose this problem???