iMac Screen - Serious Flickering w. 24 colors ???

[h8tow8]

Hi...

So I turned on the iMac and it was running fine for about 5-10min when I noticed total loss of color to what looked like 24 colors and flickering... I tried to do the display firmware update 1.0 (I'm running MAC OS X 10.6.2) it gave me some alert that I don't need this update... All software is up to do...

Any ideas?

Attached a couple pics...

Tks,
CK

 

[Michaelgtrusa]

Sounds like the GPU! I would call apple on this issue asap.

 

[chrisdazzo]

Definitely the GPU here. Sucks, but it happens once in a while. Another firmware update is unlikely to fix it.