I'm very sorry to hear about this. You may to try a factory reset to see if that will help: http://www.samsung.com/us/support/supportOwnersHowToGuidePopup.do?howto_guide_seq=6706&prd_ia_cd=N0000058&map_seq=44732
Has anyone else seen the problem where the UN55C8000 will power on and lock on NetFlix? At the moment, whenever I power up the TV, it locks to netflix with none of the buttons working at all, and I effectively can't use the tv.
I made sure I was on the latest update and everything else, so any ideas would help.