I have the same problem. phone in pristine condition, blanked after update. phone still works alarms etc, can sometimes get it to display via hdmi on TV. but it's inconsitent. managed to back up all my data whilst viewing through hdmi to v. samsung rep unhelpful. phone still under warranty, but I live in rural are so turn around time for getting it fixed will be at least 3 weeks. completely unacceptable. is suspiciously coincidental, that the update, bricking phones around Australia, coincides with their new galaxy s23 release???