If there’s a pulsing orange LED light on your Chromecast device and a black TV screen, try the first step below and check if it resolves the issue. If it doesn't, move on to the next steps: Unplug your Chromecast from the power source, wait about one minute, and then plug it back in. Power off your TV.
turn on location and bluetooth and you will find your TV to connect with the phone. They are both on, and Google tv has the permissions. Try going into the Google Home app. Then select the Chromecast TV device. Hopefully it will prompt you to put in a code that shows up on the TV. Then go back into the Google TV app and see if the remote optionTo fix a Chromecast that’s blinking white, try each of these fixes: Check the position of your Chromecast and your wireless router. If you’ve moved either your Chromecast or your router, the Chromecast may not have a strong enough signal to connect. Try moving things around to reduce interference and improve the Wi-Fi signal .naTLx3U.