118 Chapter 11TroubleshootingAn Error Message Appears On The Screen Service Error 5100 is Displayed Writing Error/Output Error/Communication ErrorCause ActionMovement of the FINE CartridgeHolder is blocked.Clear the paper jam or foreign object that is preventing the FINE CartridgeHolder from moving, cancel printing from your computer, then turn OFFthe machine and turn it back ON again.Cause ActionMachine is not ready. Ensure that the [ON/OFF] lamp on the Operation Panel is on.If the lamp on the Operation Panel is off, turn the machine ON.If the Alarm lamp is on, an error may have occurred in the machine. Fordetails on how to resolve the error, refer to “An Error Message IsDisplayed On The LCD” on page 99.Paper is not loaded. Load paper and press [OK].If this error (Paper is not loaded) is ignored for a certain period of time, anadditional message may be displayed.Printer port setting does not matchthe interface connected to themachine.Check the printer port settings.1. Click [Start] and select [Control Panel], [Printers and Other Hardware],and then [Printers and Faxes].For non-Windows XP, click [Start], select [Settings], and then [Printers].2. Select the icon of your machine.3. Open the [File] menu and select [Properties].4. Click the [Ports] tab (or the [Details] tab) to confirm the port settings.A USB port is selected if either USBnnn (Canon MP450) or MPUSBPRNnn(Canon MP450) (where n is a number) is indicated.If the port setting is not correct, change the port setting according to theinterface you are using on the [Ports] tab (or the [Details] tab), or reinstallthe MP driver.Machine is not properly connected. Ensure that the USB cable is securely connected to the computer.z Disconnect the machine and reconnect it directly to the computer andtry printing again. If successful, the problem may have been with thedevice.z There could also be a problem with the cable(s). Replace the cable(s)and try printing again.MP driver is not installed properly. Uninstall then reinstall the MP driver.1. Click [Start], and select [All Programs] (or [Programs]), the name of yourmachine, and [Uninstall].2. Follow the on-screen instructions to uninstall the driver.3. Follow the procedures described in the Easy Setup Instructions andreinstall the MP driver.