Hi There,
This is most likely a screen issue. Replacing the TFT will probably fix the problem. In early TFT screens you will often see several drivers, each controlling a certain half or quadrant of the screen depending on the screen panel size. It does not look like the back light is broken because you can still see the characteristic glow. As said before, it is probably a driver issue. You can try searching for driver IC's on ebay but if I were you, I would look for a replacement panel all together.
Good luck!