My Hisense TV just went off after an update, please can i get any help.??

I'd waait 10 minutes just incase it's still doing it's thing, otherwise unplug the power to it for 5 minutes and plug it back in and try again.
 
To factory reset a tv there maybe just a couple of buttons on the remote or tv you need to press simultaneously for a few moments.

If you search your tv model or brand how to factory reset youll find which buttons.
 
Sorry joraff911, I can't find anything to reset your tv. I don't think its possible to do a hard reset without the tv menus.

Best to contact Hisense customer support.