回答“Are my iBook G4 parts worth anything?”I'm sure they are. The best thing, all depending on where you live, is to either post them on eBay or Craigslist.
回答“I have a coloured line down the middle of my screen, can I fix it?”There are 3 sub-pixels ( Red, Green, Blue ) for each pixel. If the transistor that controls the pixel is not receiving power, it may only be passing light at that point. In your case, they are always green.