Hold down the button for a little longer. If you still cannot turn off the printer, unplug the power cord. To prevent the print head from drying out, turn the printer back on and turn it off by pressing the button.
Print Selected Pages
Solving Problems
The Printer Does Not Work as Expected
The Printer Does Not Turn On or Off
Power Does Not Turn On
Power Does Not Turn Off
Power Turns Off Automatically
Paper Does Not Feed Properly
No Paper Feeds
Paper Feeds at a Slant
Several Sheets of Paper are Fed at a Time
Paper Does Not Feed Properly from the Front Paper Feeder
Roll Paper Does Not Feed Properly
CD/DVD Tray is Ejected when You Try to Load It
Cannot Print
Cannot Print from Windows
Checking the Connection Status
Cannot connect to a Network
The Printer Cannot Connect by USB (Windows)
Cannot Print Even Though a Connection has been Established (Windows)
Suddenly the Printer Cannot Print over a Network Connection
Cannot Print from Mac OS
Checking the Connection Status
Cannot connect to a Network
The Printer Cannot Connect by USB (Mac OS)
Cannot Print Even Though a Connection has been Established (Mac OS)
Suddenly the Printer Cannot Print over a Network Connection
Cannot Print from Smart Device
Checking the Connection Status
Cannot connect to a Network
Cannot Print Even Though a Connection has been Established (iOS)
Suddenly the Printer Cannot Print over a Network Connection
Cannot Operate the Printer as Expected
Operations are Slow
Printing Is Too Slow
Printing Slows Down Dramatically During Continuous Printing
LCD Screen Gets Dark
The Output Tray has Come Off
The Root Certificate Needs to be Updated
Cannot Cancel Printing from a Computer Running Mac OS X v10.6.8
A Message is Displayed on the LCD Screen
Paper Gets Jammed
Preventing Paper Jams
It is Time to Replace the Ink Cartridges
Ink Cartridge Handling Precautions
Replacing Ink Cartridge
It is Time to Replace the Maintenance Box
Maintenance Box Handling Precautions
Replacing a Maintenance Box
Print Quality is Poor
Color Missing, Banding, or Unexpected Colors Appear in Printout
Blurry Prints, Vertical Banding, or Misalignment
Printout Comes Out as a Blank Sheet
Paper Is Smeared or Scuffed
Printed Photos are Sticky
Images or Photos are Printed in Unexpected Colors
Colors in the Printout Differ from Those on the Display
Cannot Print Without Margins
Edges of the Image are Cropped During Borderless Printing
The Position, Size, or Margins of the Printout Are Incorrect
Printed Characters Are Incorrect or Garbled
The Printed Image Is Inverted
Mosaic-Like Patterns in the Prints
Vertical lines Appears on Roll Paper
White Dots Appear in Printouts
The Top Edge of the Paper is Scratched
Eject Roller Marks Appear on Printouts
Some Parts of Pre-printed Paper Cannot be Printed
Uneven Colors Appear at the Bottom Edge of Glossy Paper