You will need to reset the printer wireless network adapter first. How to Restore the Network Settings on the X4650 AIO to the Original Factory Defaults. After resetting the network settings, launch the Lexmark wireless setup utility on your laptop. Follow the instructions on your computer screen.
I`ll guess You`ll have to connect your PC to the printer with the use of a usb cable.
Then run the Lexmark software (Lexmark printer home) or similar (don`t know what you are using?)... Go to "settings"; and choose wireless setup utility. You`ll have to manually set the SSID (the wanted wireless network) and the WIFI password for this network. Hope this will help.
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