konica minolta c252, network botton is gone, I reset the print controller,power off/on, reset all counters and still cant' see netwok section on tech rep mode, admin, I did firmware update still don't see the netwrk botton, I need to do nvram firmware to get this thing bakc again to the netwrok, I really don't want to buy controller. please help, need to know how to do nvram update........thanks.