To resolve the ij.canon.start printer offline error, start by checking the printer's connection to the network and your computer. Ensure both are properly connected and powered on. Restart your printer and computer to refresh the connection. Update printer drivers and firmware through ij.canon.start to ensure compatibility and functionality. Verify the printer's status in the control panel or printer settings on your computer. If issues persist, reset the printer's network settings and reconnect it to the network. For further assistance, visit ij.canon.start or consult Canon's support for troubleshooting steps tailored to your printer model.