My refrigerator has a issue where the refrigerator lights stop working and the interface screen on the inside edge of the door goes blank. I'll receive a error code "SY CF". During the time the lights and screen are off the refrigerator keeps cooling and the freezer lights remain working. Everything will eventually come back on and will be fine only to fault again later. I've checked wire connections at the hinges, mother board and also behind the interface screen and found no issues. Just looking for advice on where to look next.