FRU:04X4781 For Lenovo ThinkPad E540 Laptop Motherboard AILE2 NM-A161 Mainboard
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.