56 TroubleshootingMessage Appears on the Computer Screen Service Error 5100 Is Displayed Writing Error/Output Error/Communication ErrorCause ActionMovement of the FINE CartridgeHolder is blocked.Cancel printing from your computer, turn off the machine. Then clear the paperjam or foreign object that is preventing the FINE Cartridge Holder from moving.ImportantBe careful not to touch the components inside the machine. The machine maynot print out properly if you touch it.Cause ActionThe machine is not ready. Confirm that the Power lamp is lit green.If the Power lamp is off, turn the machine on.While the Power lamp is flashing green, the machine is initializing. Wait until thePower lamp stops flashing and remains lit green.If the Alarm lamp is lit orange, an error may have occurred on the machine. Fordetails on how to resolve the error, see “An Error Code Is Displayed on the LED”on page 44.The machine is not connected properly. Make sure that the USB cable is securely plugged into the machine and thecomputer.z If you are using a relay device such as a USB hub, disconnect it, connect themachine directly to the computer, and try printing again. If printing startsnormally, there is a problem with the relay device.Consult the reseller of the relay device for details.z There could also be a problem with the USB cable. Replace the USB cableand try printing again.Printer port setting does not match thecomputer’s interface connecting themachine.Check the printer port settings.* In the following instruction, “XXX” signifies your machine’s name.(1)Log into a user account with the administrator privilege.(2)Click Control Panel, then Printer under Hardware and Sound.In Windows XP, click Control Panel, Printers and Other Hardware, thenPrinters and Faxes.In Windows 2000, click Control Panel then Printers.(3)Right-click the Canon XXX icon, then select Properties.(4)Click the Ports tab to confirm the port settings.Make sure that a port named USBnnn (where “n” is a number) with CanonXXX Printer appearing in the Printer column is selected for Print to thefollowing port(s).If the port setting is not correct, reinstall the MP Drivers or change the portsetting according to the interface you are using.MP Drivers are not installed properly. The MP Drivers may not be installed properly. Uninstall them following theprocedure described in the PC Printing Guide on-screen manual and reinstallthem following the procedure described in your setup sheet.