They flex when you open/close the laptop. But, they also have a backlight that can go bad. Either way, you probably can't diagnose and fix it. At two years, I would think the repair costs would go a long way towards getting a brand new machine with a brand new warranty.
2 year old laptop lcd monitor stopped working. Hooked up to a CRT monitor and it worked. Might this just be a loose cable in the laptop?