Pay Attention: If some keys will don't work after installed ,this is not because keyboard is broken but you don't connect well the ribbon cable of our keyboard 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 : *Frame :No *Backlit :Yes *Trackpoint: Yes *Color : Gray *Letter : English *Layout : US Layout *Status : New Original Compatible Models: HP Zbook 15 G3 G4 & Zbook 17 G3 G4 Series Laptop Compatible Part No 848311-001 PK131C31A00 See more

?Solution of keys don't work?If some keys don't work after install ,You can try to reconnect the ribbon cable in case bad connected ,pls use a dry cloth to wipe metal head of the connect ribbon,then try to connect about few times,many customer solve this problem after did this. ?Keyboard Layout?: Color: Gray. US Layout with Backlit with Pointer. ?Compatible P/N?: 848311-001 PK131C31A00. ?Compatible Model?: HP Zbook 17 G3 & Zbook 17 G4 Series Laptop. ?Compatible Model?: HP Zbook 15 G3 & Zbook 15 G4 Series Laptop.