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.
Re: Old tv has only HDMI ports - no USB port - what product/converter do I need???
A 3900x express has hdmi output so simple hdmi cable will connect it to a tv with hdmi inputs. The 3900 usb port is how it gets power, you plug into usb ac adapter, see the first cable listed on this page: