Restart your Chromecast by unplugging it for 10-15 seconds and then plugging it back in. 2. Restart the device you are using to cast. 3. Check that both your casting device and Chromecast are connected to the same Wi-Fi network. 4. If the problem persists, factory reset your Chromecast by holding the reset button for 25 seconds and then reset it using the Google Home app. 5. Make sure your Chromecast has the latest firmware and no physical interference nearby.