Display Problems

Hi guys,

Recently my laptop decided to freeze and shut itself down after i tried to connect it to my tv via an s-video. After that it wouldnt boot up properly. I managed to solve the problem by going into the advanced boot options and selecting 'Low resolution video'. Once i had logged in, i restored the laptop ad also re-installed the NVIDIA drivers. Restarted and i managed to solve that problem.

But now there seems to be a grid of pixels across various parts of the screen. i.e. on the start menu, the sidebar and whenever i play a video (in quicktime not in wmplayer or via the internet). it looks a bit like this but on a smaller scale...

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When the display is in 'High 32bit' video, sidebar and start menu are all like the above. when the display is in 'Medium 16bit' only the video is like that, but obviously the quality is rubbish.

I have no idea what to do to get rid of it. Any help would be awesome!
Thankyou!

This is the graphic card that is damage. You will need to change it.