Why Xbox update failed?

It seems technical problem to me, when you were asked for an update, you must have cancelled that because some updates are just a spam, but don’t worry. I am not much aware of that what update you allowed and why I guess that the update probably bricked your console? contact Xbox support and so you must discuss the issue with customer care of Xbox, and if they will not be able to fix it they will replace your system with a brand new Xbox. So I would advise you, don’t mess with it anymore. Just contact them and they will provide you a best solution and if they will repair it for you than you must ask them to extend warranty, so that in future if it does not work properly you can again consult them for repair that will be free of cost if it will be under warranty by that time. Lastly, I would advise you to contact service center, don’t try to fix it yourself. Good luck.