To set up a Linksys range extender, begin by plugging the device into a power outlet near your router. Wait for the LED to blink orange, then connect to the extender's network from your computer or smartphone. Open a web browser and enter extender linksys com or "192.168.1.1" to access the setup page. Follow the on-screen instructions to select your Wi-Fi network and enter the password. The extender will then configure itself to your network settings. Once the setup is complete, the LED will turn solid green, indicating a successful connection. For further assistance with your extender Linksys setup, refer to the user manual or contact technical support.