Printer Suddenly Cannot Be Used

Cannot Communicate with Printer Following Network Settings Change (Windows)

It may take a while for the computer to obtain an IP address, or you may need to restart your computer.

Make sure the computer has obtained a valid IP address, and try again to find the printer.

Cannot Communicate with Printer via Wireless LAN

1. Check1 Check printer and network device (router, etc.) status.

   If the printer and network devices are off, turn them on.

   If they are on, turn them off and on again.

2. Check2 Make sure printer and wireless router network settings match.

   Make sure the network settings of the printer (e.g. wireless router name, SSID, network key, etc.) are identical with those of the wireless router.

   To check the settings of the wireless router, refer to the instruction manual provided with it or contact its manufacturer.

   To check the current network settings of the printer, print out the network setting information.

   Printing Network Settings

   If the printer network settings do not match with those of the wireless router, change the network settings of the printer to match with those of the wireless router.

   Note

   • For Windows, change printer's settings using IJ Network Device Setup Utility.

     Performing/Changing Wireless LAN Settings

3. Check3 Make sure the printer is not placed too far away from the wireless router.

   Place the wireless router and printer where there are no obstacles between them. Wireless communication between different rooms or floors is generally poor. Wireless communication can be impeded by building materials containing metal or concrete. If the printer cannot communicate with the computer over a wireless LAN due to a wall, place the printer and the computer in the same room.

   In addition, if a device like a microwave oven that emits radio waves of the same frequency bandwidth as a wireless router is nearby, it may cause interference. Place the wireless router as far away from interference sources as possible.

4. Check4 Make sure wireless signal is strong. Monitor signal status and move printer and wireless router as necessary.

   Note

   • For Windows, monitor signal status using IJ Network Device Setup Utility.

     Checking Wireless Network Status

5. Check5 Make sure computer network settings are correct.

   For more on connecting and setting up a network device, see the device instruction manual or contact its manufacturer.

6. Check6 Make sure you are using a valid channel.

   Usable wireless channels may be limited depending on wireless network device used by your computer. See the instruction manual provided with your computer or wireless network device to check usable wireless channels.

7. Check7 Make sure channel set on wireless router is a usable channel as confirmed in Check 6.

   If it is not, change the channel set on the wireless router.

8. Check8 Make sure security software's firewall is off.

   If your security software's firewall is on, a message may appear warning you that Canon software is attempting to access the network. If this warning message appears, set security software to always allow access.

   If you are using any programs that switch between network environments, check their settings. Some programs use a firewall by default.

9. Check9 If printer is connected to an AirPort Base Station via LAN, use alphanumeric characters for network identifier (SSID). (Mac OS)

If the problem is not resolved, redo setup.

• For Windows:

  Use the Setup CD-ROM or follow the instructions on the Canon website.

• For Mac OS:

  Follow the instructions on the Canon website.

• Positioning:

  Make sure there are no obstacles between the wireless router and the printer.

Cannot Communicate with Printer Using Direct Connection

1. Check1 Make sure printer is turned on.

2. Check2 Is the icon displayed on the LCD?

   If the icon is not displayed, select Activate direct connect. on Change LAN in LAN settings on the HOME screen.

3. Check3 Make sure printer is selected as connection for wireless communication device (e.g. smartphone or tablet).

   Select the identifier for direct connection (SSID) specified for the printer as the connection destination for communication devices.

4. Check4 Have you entered the proper password specified for the direct connection?

   If the security setting of the direct connection is enabled, you need to enter the password to connect your communication device to the printer.

   To check the password specified for the printer, display it using the operation panel of the printer or print out the network setting information of the printer.

   • Display on the LCD.

     LAN settings (Item for administrator)

   • Print the network settings.

     Printing Network Settings

5. Check5 Make sure the printer is not placed too far away from the wireless router.

   Place the wireless router and printer where there are no obstacles between them. Wireless communication between different rooms or floors is generally poor. Wireless communication can be impeded by building materials containing metal or concrete. If the printer cannot communicate with the computer over a wireless LAN due to a wall, place the printer and the computer in the same room.

   In addition, if a device like a microwave oven that emits radio waves of the same frequency bandwidth as a wireless router is nearby, it may cause interference. Place the wireless router as far away from interference sources as possible.

6. Check6 Make sure 5 devices are already connected.

   Direct Connection does not allow more than 5 devices to be connected.

Cannot Communicate with Printer via Wired LAN

1. Check1 Make sure printer is turned on.

2. Check2 Make sure the LAN cable is connected properly.

   Make sure the printer is connected to the router with the LAN cable. If the LAN cable is loose, connect the cable properly.

   If the LAN cable is connected to the WAN side of the router, connect the cable to the LAN side of the router.

If the problem is not resolved, redo setup.

• For Windows:

  Use the Setup CD-ROM or follow the instructions on the Canon website.

• For Mac OS:

  Follow the instructions on the Canon website.

Cannot Print from Network Computer

1. Check1 Make sure computer network settings are correct.

   For more on computer setup, see your computer instruction manual or contact its manufacturer.

2. Check2 If printer driver is not installed, install it.

   • For Windows:

     Install the printer driver using the Setup CD-ROM or install it from the Canon website.

   • For Mac OS:

     Install the printer driver from the Canon website.

3. Check3 When using wireless LAN, make sure wireless router does not restrict which computers can access it.

   For more on connecting to and setting up your wireless router, see the wireless router instruction manual or contact its manufacturer.

   Note

   • To check the MAC address or IP address of your computer, see Checking Computer IP Address or MAC Address.