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Printer Suddenly Stopped Working for Some Reason

Cannot Connect to a Printer after Network Configuration Changes

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 Connect to a Printer via Wireless LAN (Wi-Fi)

  1. Check1 Check the power status of printer, network devices (e.g. wireless router), and smartphone/tablet.

    • Turn on the printer or devices.
    • If the power is already turned on, cycle the power switch.
    • It may be necessary to resolve wireless router problems (e.g. update interval of a key, problems of DHCP update interval, energy saving mode, etc.) or to update the wireless router firmware.

    For details, contact the manufacturer of your wireless router.

  2. Check2 Can you view any web pages on your computer?

    Make sure your computer is connected to the wireless router properly.

    For more on checking computer settings or connection status, see the instruction manual supplied with the computer or contact the manufacturer.

  3. Check3 Is the printer connected to the wireless router?

    Use the icon on the LCD to check the connection status between the printer and wireless router. If the icon is not displayed, Wi-Fi is disabled. Turn on wireless communication on the printer.

  4. Check4 Make sure the printer and wireless router network settings match.

    Make sure the network settings of the printer (e.g. network name (SSID) or network key (password), 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.

    Note

    • Use 2.4 GHz or 5 GHz frequency band to connect to a wireless router. Match the network name (SSID) set for the printer with that for 2.4 GHz or 5 GHz frequency band of the wireless router.

    To check the current network settings of the printer, display it using the operation panel of the printer or print out the network setting information of the printer.

    Note

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

    If the distance between the printer and wireless router is too far, wireless communication becomes poor. Place the printer and wireless router close to each other.

    Note

    • Though an antenna is attached to most wireless routers, some of them have it inside.

  6. Check6 Make sure wireless signal is strong. Monitor signal status and move printer and wireless router as necessary.

    Place the printer and wireless router 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 Wi-Fi 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.

    Check the signal strength on the LCD.

    Note

  7. Check7 Make sure of the Wi-Fi channel numbers used for your computer.

    You need to have the same Wi-Fi channel number that you are using for the wireless router as your computer. It is normally set in the way that you can use all the Wi-Fi channels. However, when the channels that you are using are restricted, the Wi-Fi channels do not match.

    See the instruction manual provided with your computer and check the Wi-Fi channel number available for your computer.

  8. Check8 Make sure channel set on wireless router is a usable channel as confirmed in Check 7.

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

  9. Check9 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.

  10. Check10 If printer is connected to an AirPort Base Station via LAN, make sure you use alphanumeric characters for network name (SSID). (macOS)

If the problem is not resolved, click here and redo setup.

  • Positioning:

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

Cannot Connect to a Printer through Wireless Direct

  1. Check1 Check the power status of printer.

    If the power is already turned on, cycle the power switch.

  2. Check2 Is the icon displayed on the LCD?

    If not, Wireless Direct is disabled. Turn on Wireless Direct.

  3. Check3 Check the settings of your device (smartphone/tablet).

    Make sure Wi-Fi is enabled on your device.

    For details, refer to your device's instruction manual.

  4. Check4 Make sure printer is selected as connection for device (e.g. smartphone or tablet).

    Select the network name (SSID) for Wireless Direct specified for the printer as the connection destination for devices.

    Check the destination on your device.

    For details, refer to your device's instruction manual or visit the manufacturer's website.

    To check the network name (SSID) for Wireless Direct specified for the printer, display it using the operation panel of the printer or print out the network setting information of the printer.

  5. Check5 Have you entered the proper password specified for the Wireless Direct?

    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.

  6. Check6 Make sure the printer is not placed too far away from the device.

    If the distance between the printer and device is too far, wireless communication becomes poor. Place the printer and device close to each other.

  7. Check7 Make sure 5 devices are already connected.

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

Cannot Connect to a Printer via Wired LAN

  1. Check1 Make sure the 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 from the web page.

For Windows, you can redo setup using the Setup CD-ROM.

Cannot Print through Network

  1. Check1 Make sure the computer is connected to the wireless router.

    For more on how to check the computer settings or connection status, see your computer instruction manual or contact its manufacturer.

  2. Check2 If Printer Driver is not installed, install it. (Windows)

    Click here and install the printer driver.

  3. Check3 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