I show you how to update system software on a Hisense A6 Series 4K Smart Google TV (https://geni.us/WbwZD). I hope this helps.
Hisense 50-Inch Class A6 Series 4K UHD Smart Google TV with Alexa Compatibility, Dolby Vision HDR, DTS Virtual X, Sports & Game Modes, Voice Remote, Chromecast Built-in (50A6H): https://geni.us/WbwZD