Tilting screen causes image to turn negative (Video)

Nice pictures and video, thank you. Since the problem does not present itself when connecting an external monitor: Many times bad video cables on laptops give the same symptoms of bad LCDs. The biggest tell as to which one is faulty is if movement causes the symptoms. If the only time you see these symptoms is by moving the screen at the hinge and you can put it on a stable surface such as a desk with no screen movement and a good picture remains good, 95% chance your problem is your video cable (the wires are broken internally or 1 of the connectors is not seated properly). The other 5% is a loose component or bad solder joint on the board attached to your LCD that the video cable is plugged into. If these symptoms occur while the LCD and laptop are on a stable surface with no movement then the chances are it is your LCD. I don't have physical access to your laptop. I have to trust your senses and judgment. From what I saw in your video I would say the video cable/wires is the cause or the problem. I do not see your cable among our parts here at ifixit. I have found them being sold here and here.