Canon MX520 series Online Manual page 41

Cannot Detect the Machine with the Wired LAN: Check 3
Is the wired LAN setting of the machine enabled?
By using the operation panel of the machine, confirm the wired LAN setting of the machine.
Press the MENU button, then select Setup > Device settings > LAN settings > Change wireless/wired.
Make sure that Wired LAN active is selected on the LCD.
If Wired LAN active is not selected:
The wired LAN setting of the machine is not activated. Activate the wired LAN setting of the machine.
After activating the wired LAN setting, click Back to Top on the Check Printer Settings screen to try to set
up the network communication from the beginning.
If Wired LAN active is selected:
Go to check 4.
Cannot Detect the Machine with the Wired LAN: Check 4