Replacement Main Board for B50-50 / 100-15IBD — FOR 5B20K85589 (NM-A681)

Main board part number 5B20K85589, model NM-A681. Intended as a replacement motherboard for devices using B50-50 and 100-15IBD. Use this board when the original part is 5B20K85589 (NM-A681) to ensure compatibility.