I have a Lexmark X5470 printer which started getting errors from my computer stating" Computer can not communicate with the printer". I tried connecting the printer to 3 different computers, uninstalled the print drivers, re-installed the print drivers(using device manager). I also changed the usb cables. It also says that the left print cartridge is missing (which it isn't). I beginning to think that the printer circuit board usb port might be bad. Anyone has any suggestions?