I also have this issue. Rossmann, Do you think this is an issue with the complete lcd or with a component like the inverter or a replaceable component on the lcd?
Here are some pics I took next to my other macbook which is working fine.
OP: Try pressing Command + Option + Control + 8 on your keyboard. It looks like you might have inverted the screen colors on accident. Either that or this is indeed a bit of an issue.
I wish that was the problem, but I already thought of that one. Definitely a display issue. when I run to an external or take a screen shot it looks fine. I have to replace a part somewhere and I am just hoping to spend the least amount possible.
I used a little rubbing alcohol on some q-tips to clean the dirty spots and the display is as good as new. I saved $100 instead of buying a new LCD. No need to take it to the shooting range after all.