Funny that hapened to me 2 weeks ago in my 470k with 3 cables. It started to get a white screen when the LCD was at certain positions. One day got worse and it came smoke from the Hinge. I acted fast and disconneted the battery and powersource.
My fix: 3 small wires i took in from eletronic stuff that dont work anymore to act as a 2-3cm middle extension wire connecting the broken wires by soldering, duct tape to cover the soldering work. Marvelous!!!