had same year same model as you
logic board died
they realized it was due to the 8600GT
gave me a new logic board + keyboard + LCD free of charge.
This was 5 months ago. The logic board had killed the LCD and the keyboard as well.... i paid NOTHING out of pocket
What process of repair did you go through? Your story and formerglory's gives me hope they will see it's the chip's fault the logic board failed and this will wind up being free for me.