I have a friend who has a Samsung NP R700 laptop, that upon start up, all that shows are thin, gray vertical lines. After a minute or so the lines start to show some color. I can hear the windows start up sound, but that's all. Just the vertical colored lines remain. My guess is that the laptop has overheated and since I can hear windows starting up, that the only problem is in the graphics card. Would I be correct in my assumption?
Intel Core 2 Duo T5450 1.66 GHz
2GB Ram 17in. display
Nvidia Geforce 8400M GS 128MB
Ok, here goes. Prior to hooking up an external monitor, I turned the laptop on again, this time the vertical bars showed up again, but by the time windows booted up, they went away. The desktop was back. I thought i would put in a dvd just to see what would happen, and just as I thought...as soon as I got through the menu and to the main movie, the screen blacks out. I can still see the desktop in the background, but inside my movie player window...nothing, just audio.
Now, I am back to square one...I think the graphic card is shot.