Pay Attention: If some keys will don't work after installed ,this is not because keyboard is broken ,the most posiibility is ribbon cable don't connect well with your laptop ,pls try to reconnect more times .Many customers solve this problem after did this. We tested every keyboard before shipping ,please be assured the purchase. thanks *Backlit : No *Color : Black *Layout : US keyboard layout *Status : Brand new Compatible Models: for Lenovo ThinkPad T540 E531 W540 W541 W550 W550S T540P T550 Series, Fit P/N 0C45254 04Y2465（Without Red Pointer）