Canon imageCLASS MF3110 Software Manual page 140

No power is supplied.
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Printer stops printing.
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<CHECK PAPER SIZE> message appears in the LCD of the machine.
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Printout is wrong.
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4-2 Printer Problems
Is the power cord plugged in?
Make sure the power cord is securely plugged into both the machine and the
AC outlet.
Is the AC outlet supplying power?
Make sure the AC outlet is supplying power; try another outlet if necessary.
Does the AC voltage match the printer?
Make sure the voltage of the AC outlet matches the ratings on the machine.
Is the interface cable loose?
Check your computer and cable.
Are you working on an application in the foreground?
Printer performance improves if you give priority to your print job.
Is paper setting of the machine different from that of your computer?
Load the correct paper size or change <PAPER SIZE> in <PAPER SETTINGS>
of the Menu. (See Chapter 2, "Paper Handling," in the Basic Guide.)
Is there a communication problem between the printer and your computer?
Make sure your cable connections are secure.
Make sure your USB cable is less than 9.8 ft (3 m) long.
Make sure you are not using a switch box.
Make sure you have selected the correct printer driver in Windows.
Is a wrong printer driver selected in the [Printers and Faxes] (Windows 98/Me/
2000: [Printers]) folder?
Make sure the corresponding printer driver is selected in the [Printers and
Faxes] (Windows 98/Me/2000: [Printers]) folder.