yes it is fixable
You cannot fix a physically broken screen via the graphics card. Take the computer to a repair shop and pay for a new screen to be installed.
If the black marks are dead pixels then you have to replace the screen you cant fix it.
For scales it is easest to replace the screen.
It says nook color is turning off then the screen is black
Probably not, because the screen on the nook is black and white. I don't think that the nook screen has video watching capabilities.
http://www.instructables.com/id/Replace-the-top-screen-of-a-Nintendo-DS-without-o/
buy a new caulculator they just cost 1 dollar, but to fix it 20 dolars
no
You will have to buy the touch screen from amazon, eBay or other component website.
A good computer shop should be able to replace broken parts to fix this.
Well... you really can't if you wan't to do it by yourself. Since your screen is broken, call or email Apple about what happened and they will either fix your screen or get you a new one. They would do this because it's included in your warranty.