Picture going white where it's light, but in the dark everything looks good

[larsjorgen]

I play on an Asus X53sv with a Geforce Gt540M - more than good enough, and I did have this problem before but I got it fixed. Cant remember how, though. When it worked before I could put everything on max and it still ran great.

Edit: And how do you reckon that the video card is the problem if all the other graphics are working just fine and only light is the problem?