Monitor has weird, pixelated colors, but external monitor looks fine

I have a MacBook Pro. It is a couple of years old. Recently the monitor started fritzing out. At first it would happen only happen when I ran windows through boot camp. A couple of days later, it began happening in os x too.The screen seems to be operating on a reduced amount of colors, a preponderance of green and everything is pixelated. There are blobby shaped circles of rainbow all over the desktop. Windows on top of the desktop look better, but still way too green and pixelated. All parts of the screen are equally bad. I tried changing all the settings in display. Also ran disc utility. The display on the external monitor looks fine. Any ideas on how I can fix this?

Some MBP have bad nVidea graphics chips that can do wheat you describe, except it usually affects an external monitor as well. It's covered by a warranty extension program here:
http://support.apple.com/kb/TS2377

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