Laptop keyboard HP EliteBook 755 G3 755 G4 850 G3 850 G4 ZBook 15u G3 black without trackpoint

Laptop model:

HP EliteBook 745 G4 840 G4 848 G3 848 G4 755 G3 755 G4 850 G3 850 G4 ZBook 15u G3 755-G3 850-G3 850-G4  850-G3  850-G4 Series  ZBook 15u G3 

Part numbers: 836621-B31 836623-031 821195-001 836623-001 821195-001 6037B0116725 821157-281 836623-001 821157-001 821195-001 SN9145BL HPM14N5