Hi ppl well my problem is that i was using my computer yesterday and then i turned it off and like after 15 min i turned it on again and all I get is a blank white screen anytime i turn the computer on but anyways it still running . I hooked it up to an external monitor and it worked fine then i started "startup repair" and when it rebooted the screen on the laotop worked fine and the external monitor too but when i turned it off and on again the whte screen stills there. I did'nt drop it or anything. I have heard about loose ribbon cables or something but would like some input before i go unscrewing everything.