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 : YES *Color : Black *Layout : US keyboard layout *Status : Brand new Compatible Models: for Lenovo IBM ThinkPad E531 E540 W540 W541 W550 W550S E545 T540 T540P T550 L540 L560 L570 04Y2660 F217 20J8 20J9 20JQ 20JR