可能試下
From the Chromecast device
While the Chromecast is plugged into the TV and powered, hold down the button on the Chromecast device for at least 25 seconds or until the solid LED light flashes red.
Once the LED light blinks white and the TV goes blank, release the button. The device should then restart.
https://support.google.com › answer
How to factory reset your Chromecast - Android - Google Help