If you get a printer connection error or if you've changed your router or Internet service provider, you may need to verify and correctly set the SSID / network name on the printer.
Check the network name on the printer
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Make sure your printer is powered on.
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Press the Setup 
button on the printer.
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Use the right/left arrow buttons 
to do the following:
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Select Device settings, then press the OK button.
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Select LAN settings, then press the OK button.
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Select Print LAN details, then press the OK button.
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Confirm that the printer is connected to the correct network name.
Check the network name on the computer
- Click on the appropriate network icon from the system tray (at the bottom right of your screen).
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Windows XP: 
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Windows Vista: 
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Windows 7 / 8 / 8.1: 
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Windows 10: 
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Make note of the network name. For instance, it's ABCDNet in the example below.
Your display may look different from this one, depending on your operating system.
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Compare this network name with the one you saw in the printer settings. If it's different, connect your computer to the same network as that of the printer.
