I have a Samsung netbook N130, out of warranty. One day a kid sat on it and since then the display on the monitor is split horizontally. Each half is a duplicate of the other as you can see on these images (see the Start button).
My initial though was that the motherboard may have been damaged. But also thinking the screen may need to be replaced.
I know it is not easy to diagnose without seeing it, but have you ever come across this before? I'm happy to take it apart, but not sure how to diagnose the problem.
EDIT: I should have done this before, but when I connect this to an external monitor, the image is fine. So could this be the connection or the backlight?