HP PC Board
IR4068K312NJ
is compatible in the following HP Models:
HP Color LaserJet CM4540 Multifunction Printer series
HP COLOR LASERJET ENTERPRISE CM4540 MFP - CC419A
HP COLOR LASERJET ENTERPRISE CM4540F MFP - CC420A
HP COLOR LASERJET ENTERPRISE CM4540FSKM MFP - CC421A