Something happened one day and my monitor started to flicker and go on so I check the color settings....guess what? It only had one color and that was the lowest 4 bit setting....no other choices available.

So, I messed around with it and when I went back, it had two colors; 16 bit and 32 bit, which is what it now has. I was thinking it should have more choices....does it? If so, what went wrong? Why did I lose them?