I inherited a 15" MacBook pro 2009. It has a 3.06 core 2 processor. When you press the power button the fans come on but there is chime, the screen remains black, and the sleep light never comes on. I have removed the logic board and inspected it for liquid damage and the is no signs of it just dust. I have tried all the usual smc resets etc. including changing the ram. Would this be an issue with the video chip. I have a small reflow station.