Help getting started with Roku devices, including setup, connecting your device to your TV, linking a Roku device to your account at my.roku.com/link, adding channels, subscribing to services, and more.
Can you please explain when you say that it is not recognized by any devices? Does your TV not detect the device? Have you tried plugging the Roku device into another TV to see if it detected? How are you powering the device, is it plugged into the TV USB port or is it plugged into a wall out with the provided cable and adapter?
With more information we will be able to assist you further.