142 Chapter 12Troubleshooting Writing Error/Output Error/Communication ErrorCause ActionMachine is not ready. Ensure that the lamp on the Operation Panel lights.If the lamp on the Operation Panel is off, turn the machine on.While the Power Lamp is flashing green, the machine is initializing. Waituntil the Power Lamp stops flashing and stays lit. When the Alarm Lamplights orange, an error may occur in the machine. For details on how toresolve the error, see “An Error Message is Displayed on the LCD” onpage 115.Paper is not loaded. Load paper and press [OK].If paper is loaded, ensure that the paper source (the Auto Sheet Feeder orCassette) is selected correctly. If the paper source is not selectedcorrectly, use [Feed Switch] or the printer driver to change the papersource.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 MP950 Series Printer)]or [MPUSBPRNnn (Canon MP950 Printer)] (where n is a number) isindicated.If the port setting is not correct, change the port setting according tothe interface you are using on the [Ports] tab (or the [Details] tab), orreinstall the MP Drivers.Machine is not properly connected. Ensure that the printer cable is securely connected to the computer.z If using a switching hub or other device, disconnect the machine andreconnect it directly to the computer and try printing again. Ifsuccessful, the problem may have been with the device.z There could also be a problem with the cable(s). Replace the cable(s)and try printing again.MP Drivers is not installed properly. Uninstall then reinstall the MP Drivers.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 Drivers.