There are several reasons may make you have no Internet connection. Below is a normal topology of powerline network.
Please make sure the modem or router has Internet connection. You can simply connect a computer to it to have a check.
Please make sure the physical connection is correct. The Ethernet LED should be on.
Please make sure the Powerline LED is light up on your all adapter. If not, please refer to the FAQ_258 to pair them.
Please check the IP of your computers. It should be in the same segment with your router. Please refer to FAQ_62 to check the IP address.
If you can’t get a correct IP address, please refer to FAQ_89 to configure the IP parameters manually.
If you still can’t get Internet connection after these steps, please feel free to mail us. firstname.lastname@example.org