Red screen backgroud on CM7 G2

[moladibari2009]

I have CM7 on my rooted overclocked to 1.4 Ghz G2 and my screen has an obvious red color, no matter what photo I use as wallpaper the faces come out red.
Is it because of CM7, overclocking? I searched Google, but I found only 'red line on the screen etc..' which is not the case for my cell.

Thanks