Imac display - dark cloud flickers in corner

Hello. I bought a 24" intel based iMac March 2008. Today after about an hour of being on, the bottom right corner started going dark and cloudy - kind of looked like a bulb going out behind the screen. It strectched to being the whole bottom right quarter and the rest of the screen seemed to flicker but still stayed relatively bright. I've turned it off now but am rightly freaked out...I called apple and they said to take it to a repair shop but would like to know if there's anything I can do here before I take that step. Any advice?? I couldn't find anything like this in the forums.
THANK YOU!
b.-

The same thing happened to me this morning with an identical iMac in the same space on the screen. Anyone with ideas, I'm all ears.

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Message was edited by: geekboy2000 - corrected OS

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Message was edited by: nachdenki

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Imac display - dark cloud flickers in corner

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