Galaxy Note 8 Black screen after attempting update

Hi all

Happy New Year! looking for some guidance/help I have a galaxy note 8 working perfectly up until an update and then it crashed, ever since then I’ve failed to get it to restart, I’ve done the usual power button plus the volume up , volume down and Bixby button methods, all those possible solutions I’ve already tried, sometimes it will boot up so I can get into the maintenance functions to clear cache, reboot or reset etc, but thats as far as it gets and then crashes again, so has anybody got any solutions to what it could be or what needs repairing.

Colin.