have hamiliton er 60 changers with mars validators, found changer down this evening. validator not showing any power and controller flashing. after several attempts and reboot the validator would never activate or show power. i then replaced with new mars validator we keep as backup. validator powered up fine, controller reset with no error codes. inserted 1 and 5 dollar bills, validator accepted but no hopper output. did not even try to output token. funny things is no error code was demonstrated on controller and changer will continue to accept money without dispensing token. never had this problem.