Norcold Optical Display Board 639550/ 50856 (fits select N7X/ N8X models) Fits these Norcold refrigerator models:N7X series: N7X, N7XF, N7XFR, N7XFL, N7XC, N7X.3N8X series: N8X, N8XF, N8XFR, N8XFL, N8XC, N8XCF, N8X.3Also fits Norcold replacement refrigerators 693230SP (N7X) and 693234SP (N8X). ... See More