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# When You Cannot Print

This section describes what to do if printing does not start even after performing a printing operation.

Problem | Causes | Solutions
--- | --- | ---
Printing does not start. | The power is off. | Check the cable is securely plugged into the power outlet and the machine. Turn on the main power switch.
Printing does not start. | The machine is set to "Offline". | Press [Online].
Printing does not start. | The cause is displayed on the screen of the control panel. | Check the error message or warning status on the display panel, and then take the required action.
Printing does not start. | The interface cable is not connected correctly. | Connect the interface cable securely. If it has a fastener, fasten that securely as well. See "Connecting to the Interface", Network and System Settings Reference.
Printing does not start. | The correct interface cable is not being used. | The type of interface cable you should use depends on the computer. Be sure to use the correct one. If the cable is damaged or worn, replace it. See "Connecting to the Interface", Network and System Settings Reference.
Printing does not start. | The interface cable was connected after the machine was switched on. | Connect the interface cable before turning on the main power switch.
Printing does not start. | If the machine is using wireless LAN, failure to print might result from a weak wireless signal. | In [System Settings], under [Interface Settings], select [Wireless LAN], and then press [Wireless LAN Signal] to check signal status. If signal quality is poor, move the machine to a location where radio waves can pass or remove objects that might cause interference. (You can check signal status only when using wireless LAN in the infrastructure mode.)
Printing does not start. | If the machine is using wireless LAN, SSID settings are incorrect. | Check using the machine's display panel that the SSID is correctly set. See "Wireless LAN", Network and System Settings Reference.
Printing does not start. | If the machine is using wireless LAN, the receiver's MAC address may be preventing communication with the access point. | Check access point settings when in the infrastructure mode. Depending on the access point, client access may be limited by MAC address. Also, check there are no problems in transmission between access point and wired clients, and between access point and wireless clients.
Printing does not start. | The login user name, login password, or driver encryption key is invalid. | Check the login user name, login password, or driver encryption key.
Printing does not start. | Advanced encryption has been set using the Extended Security function. | Check the settings of the Extended Security function with the administrator.
Data In indicator does not light up or flash. | If the Data In indicator does not light up or flash even after the print job starts, the machine has not received the data. | When the machine is connected to a computer via a cable, check the computer print port settings are correct. For details, see When the Data In Indicator Does Not Light Up or Flash. When it is networked with a computer, contact your administrator.
[List / Test Print] is disabled. | A mechanical error might have occurred. | Contact your service representative.
Printing does not start when using the extended wireless LAN in Ad-hoc mode. | The correct Communication mode is not set. | Turn off the main power switch, and then back on again. See "Turning On/Off the Power", About This Machine. In [System Settings], under [Interface Settings], select [Wireless LAN], and then set [Communication Mode] to [802.11 Ad-hoc Mode] and [Security Method] to [Off]. Then at the other side, set [SSID Setting] and [Ad-hoc Channel] to the same values.

If printing does not start, contact your service representative.

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When the Data In Indicator Does Not Light Up or Flash