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9. Troubleshooting
Print Problems
This section describes problems with printing from a computer.
• If you cannot solve a problem with the following solutions, contact your dealer.
• For problems caused by an application, contact the manufacturer of the application.
• Unable to Print
• Common to Windows and Mac OS X
• For Windows
Unable to Print
Cause Solution Reference
The machine is in Sleep mode or 
Deep Sleep mode.
Press the   (POWER SAVE) button 
to enter standby status.
Saving Power Consumption with 
the Power Save Function
The machine is turned off. Turn the machine on.
Turning the Machine On
A LAN cable or USB cable is 
unplugged.
Check that the cable is plugged into 
the machine and computer properly.
Connecting a LAN Cable/USB 
Cable
There may be a problem with a 
cable.
Replace the cable with a new cable. -
The machine is offline. Press the   (PRINT) button, and 
then select [Online].
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An error message is displayed on the 
operator panel.
Check the error messages displayed 
on the operator panel or press [?] on 
the operator panel.
Error Message List
The interface setting is disabled. Whether there is a consistency with 
the machine's settings and the 
network connection environment, 
check the settings of the interface 
that you are using on the operator 
panel.
Connecting a LAN Cable/USB 
Cable
There is a problem with the print 
function.
Check if the menu map can be 
printed.
Checking the Information of the 
Machine (Advanced Manual)
The power switch LED lamp quickly 
flashes at approximately 0.3-second 
intervals.
A malfunction may occur in the 
machine. Unplug the power cord 
immediately, and then contact your 
dealer.
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Cause Solution Reference
The machine is not set as the default 
printer.
Set the machine as the default 
printer.
Right-click the [OKI MC563 
*
] icon on 
the [Devices and Printers] folder, and 
then select [Set as Default Printer].
* Indicates the driver type. (ex. PCL6/
PS/XPS/FAX)
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