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guys now we are trying to fix the error code 602 which is common in all Canon printers now I face this problem in Canon Image runner advance c256 if second generation so this is the error code we will remove the old hard disk and put the new hard disk then come back to you yes guys first we have to remove the back side cover and you will find there is one more cover to be connected with the one screw just remove this one and we removed already the hard disk connection and there are two screws to remove the hard disk and put it back the new hard disk and go to the upgrade of the firmware because this kind of machines you must have to replace the hard disk then upgrade the firmware otherwise it will not be work guys now we have already installed a new hard disk and connect the cables and we will insert the power cable and I will come back to you to show how to upgrade the firmware if you will not upgrade the firmware the machine will not be work nice yes guys now we have insert the USB w