NORCOLD OPTICAL DISPLAY BOARD 628976
This board was made to fit any N641/841 model refrigerator with a serial number greater than 9044284 and N1095 model refrigerators with a serial number greater than 9045738. If your serial number falls below the numbers above, that means that the optical board is no longer in production and you need a board kit (containing both boards and wire adapters). The kit you would need is:
Norcold Board Kit 633287