The machine has a error code 602-0003
1) Are the connection and the cable of the connector (J1017) on the main controller PCB and the connector (J1551) on the hard disk drive normal? NO: Correct the cable connection.Hard disk drive (HDD), Main controller PCB
2) Try replacing the hard disk drive and downloading the system software.Is the problem corrected?
YES: End. NO: Replace the main controller PCB.
3) HDD unit.
Remove the rear upper cover and the reader rear cover. Remove the three screws, and detach the cover, Remove the two screws and disconnect the two connectors then, remove the HDD unit. Remove the six screws and detach the HDD When mounting the HDD unit,be sure that the flat cable is under the plastic sheet of the HDD upper case.