Plug In Chromecast
You can connect Chromecast to your TV in a few simple steps. It's important to use the cables and adaptors that come inside the Chromecast box.
First, choose the Chromecast that looks like yours below:
Step 1: Plug one end of the power supply into your Chromecast Ultra and the other end of the cable into an open outlet. You can also connect your Chromecast Ultra to an Ethernet network through the port on the power supply.
Step 2: Plug your Chromecast Ultra into any open HDMI input on your TV.
Important: Chromecast Ultra won't work with any other USB cable, or any USB cable plugged into a TV. You must use the power supply included in the Chromecast Ultra box.
Once your Chromecast Ultra is plugged in, you should see the Chromecast home screen. If you do not see the Chromecast home screen on your TV after setting up Chromecast, use the Input or Source button on your TV’s remote control to change the input until you see the Chromecast home screen.