If you send a print job to the Canon Pixma MP560 over a wireless network, and get a "Printer Not Detected" error display on your computer's screen instead of a printout, there's no need giving up on accessing your printer over the wireless network. Troubleshoot a possible cause and solution to the problem. Depending on the cause of the "Printer Not Detected" message, you may have to contact your network administrator for assistance to change the firewall's settings.
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Press the "On" button on the printer's control panel to turn it off. After 10 seconds have passed, press the "On" button again to turn the printer back on.
Turn your wireless router off by pressing its "Power" button or by unplugging the power cord. Wait 10 seconds and then turn the router back on by pressing the "Power" button or plugging the power cord back in.
Check your network's firewall settings to make sure they are not blocking the printer from accessing the network. If you cannot determine if the firewall is blocking the printer, turn the firewall software off temporarily, and try sending a print job to the printer. Talk to your network administrator about changing the firewall settings if the print job goes through.
Click the "File" option at the top of the window you have been printing from, and then click "Print." Select the MP560 from the drop-down menu at the top of the print window. Click "OK" or "Print" at the bottom-right corner of the window.
Move the printer closer to the wireless router or switch and away from objects such as wireless phones, baby monitors, microwave, refrigerator or large metal filing cabinets. Unplug the power cord from the wireless router or switch, and then plug the power cord back in, rebooting the device.
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