Same effect has started to happen to my system lately, taking 2-3 goes to get desktop. Hd light is flickering in a very specific manner as though its looking for something and failing, and constantly retrying. After maybe the third reset it will post and boot completely is a few seconds so god knows whats wrong. Nothing stands out in event viewer.
I havent tried reinstalling yet. Saving that for when new ssd firmware arrives as I suspect it will be destructive.