Canon i 850 User Manual page 160

Troubleshooting
Check the amount of free space on the hard disk.
You may need to increase the amount of free space by deleting any unnecessary files.
If the problem only occurs when printing a specific document, try editing the
document and then printing it.
If this resolves the problem, there may have been a problem in the original document. If
the same problem occurs with the edited document, contact the manufacturer of your
application.
The printer driver may not be installed correctly. Uninstall the printer driver and
reinstall it.
If the printer is connected to the USB interface, follow the procedure "Notes on Handling
the USB Interface (for Windows Users)" in the Quick Start Guide .
Uninstalling Printer Drivers
An Error Message is Displayed on the Screen 160