If something went wrong and you feel that the behavior of Android TV or Android device is incorrect – try restarting it.
For the Android TVs:
Point the remote control to the illumination LED and press and hold the POWER button of the remote control for about 5 seconds until a message Power off appears. In a minute you can turn it on.
For the Android TV boxes:
Unplug the power cord from the Chromecast device and Leave it unplugged for ~1 minute. Plug the power cord back in and wait until it turns on.