Here are some points you can check to see if your laptop is able to connect to the printer after switching network connections:

1. Check the network connection and ensure the laptop is connected to the correct network.
2. Verify the printer is available on the network.
3. Verify the IP address of the printer is up-to-date.
4. Check the driver you are using for the printer is compatible with the new connection.
5. Update the drivers for the printer if needed.
6. Restart your laptop and the printer to ensure the connection is working correctly.