5B20S41878 per Lenovo FLEX-14API scheda madre Ryzen R5-3500U CPU 4 GB-RAM LA-H091P
For Lenovo: FRU: 5B20SXXXXX/5B21BXXXXX. A:We promise that it can be compatible perfectly if you provide the correct information of Motherboard,such as the laptop model and the part number of Motherboard.