Hi all I have two lenovos one Is G70 70 When I power on the lights flash but screen remains black I have done the standard test cleaned the Hdd pins Changed the ram after cleaning the pins shined a bright light on the screen. I have even checked the mother board for signs of burnining or scorching of componants I have sent for a new screen because once before on n Hp had a problem the repire said it was the screen. I was wondering if there was some other test I could do Help Please