Question: how to connect chromecast to wifi modem?
Answer: Plug in the Chromecast. ... 
Switch the HDTV Input to the Chromecast. ... 
Download the Chromecast app. ... 
Run the Chromecast software and select the Chromecast. ... 
Confirm the Chromecast code. ... 
Rename your Chromecast (optional). ... 
Enter your Wi-Fi information. ... 
Start using your Chromecast.