Flickering Green pixels all over 21" Apple Cinema Display is getting worse

Has anyone ever had this problem before? I have a 5 year old, not overly used 21" Apple LCD Cinema Display. Just recently, it started having these tiny flickering green dots but only on black fields. Now it is getting worse. I am now having the same problem only this time, additionally, its red on white fields. It goes on and off intermitently. Sometimes, my monitor would just turn GREEN especially after viewing some photos. (I think this monitor was made in Mars or something)
What is causing this problem? Do I need to get a new monitor or can I still have it fixed? Please help.

There seems to be a couple of threads on this issue, including:
http://discussions.apple.com/thread.jspa?threadID=1954716&tstart=0
In my case, the severity of the flicker varies with what is trying to be displayed. In screensaver mode, for example, there is no flicker unless I choose to display photographs. Problem is also quite severe when I'm in Aperture; less so in Safari.
I've had the same problem with two separate graphics cards so it must be the cable or the display.

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