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
Printer Turns Off During Use
Power Turns Off Automatically
Paper Does Not Feed or Eject Correctly
No Paper Feeds
Paper Feeds at a Slant
Several Sheets of Paper are Fed at a Time
Paper Does Not Feed Correctly After Replacing the Maintenance Rollers
Paper Out Error Occurs
Original Does Not Feed in the ADF
Paper is Not Stacked in Order
Paper is Ejected in an Unexpected Direction
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)
Printer Does Not Print While Using PostScript Printer Driver (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)
Printer Does Not Print While Using PostScript Printer Driver (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 Start Scanning
Cannot Start Scanning from Windows
Checking the Connection Status
Cannot connect to a Network
The Printer Cannot Connect by USB (Windows)
The USB cable is not plugged into the electrical outlet correctly.
There is a problem with the USB hub.
There is a problem with the USB cable or the USB inlet.
The printer is connected to a SuperSpeed USB port.
Cannot Scan Even Though a Connection has been Correctly Established (Windows)
Scanning at a high resolution over a network.
Cannot Start Scanning from Mac OS
Checking the Connection Status
Cannot connect to a Network
The Printer Cannot Connect by USB (Mac OS)
The USB cable is not plugged into the electrical outlet correctly.
There is a problem with the USB hub.
There is a problem with the USB cable or the USB inlet.
The printer is connected to a SuperSpeed USB port.
Cannot Scan Even Though a Connection has been Correctly Established (Mac OS)