Troubleshooting42An Error Message is displayed on the ScreenProblem Possible Cause Try ThisWriting Error/Output Error/CommunicationErrorPrinter is not ready Ensure that the POWER lamp lights.If the POWER lamp is off, turn the printer on.The POWER lamp will flash when the printer is initializing. Wait until the POWERlamp stops flashing.When the Alarm lamp lights, an error may occur in the printer. For details on howto resolve the error, refer to “An Error Message is Displayed on the LCD” in theDirect Printing Guide.Paper is not loaded Load paper and press the OK button.If paper is loaded, ensure that the paper source is selected correctly. Select thepaper source with the Feed Switch button on the printer, or select it in theprinter driver.Printer port settingdoes not match theinterface connectedto the printerCheck the printer port settings.1. Click Start and select Control Panel, Printers and Other Hardware, and thenPrinters and Faxes.For non-Windows XP, click Start, select Settings, and then Printers.2. Select the icon of your printer.3. Open the File menu and select Properties.4. Click the Port tab (or the Details tab) to confirm the port settings.A USB port is selected if either USBnnn (Canon iP6600DiP6600DiP6600DiP6600D) or MPUSBPRNnn(Canon iP6600DiP6600DiP6600DiP6600D) (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 reinstall theprinter driver.Faulty connection Ensure that the printer cable is securely connected to the computer. If using a switching hub or other device, disconnect the printerand reconnect it directly to the computer and try printing again.If successful, the problem may have been with the device. There could also be a problem with the cable(s). Replace thecable(s) and try printing again.Printer driver is notinstalled properlyUninstall then reinstall the printer driver.1. Click Start, and select All Programs (or Programs), the name of your printer,and Uninstall.2. Follow the on-screen instructions to uninstall the driver.3. Follow the procedures described in theEasy Setup Instructions and reinstallthe printer driver.Cannot print withAutomatic DuplexPrintingIncorrect paper sizeis selectedCheck the Page Size setting from within your application to ensure that itmatches the size of the paper loaded.Check Page Size on the Page Setup tab in the printer properties dialog box(Windows) or the Page Setup dialog box (Macintosh) to ensure that it matchesthe size of the paper loaded.The sizes of media suitable for automatic duplex printing are Letter-sized and 5"x 7"/127.0 x 177.8 mm.To print on both sides of the page manually, follow the procedurebelow.On the Page Setup tab, clear the Automatic check box. Then try printing again.The manual duplex printing function cannot be used.