For some reason the display state of my drawing view is not the same as in my assembly, it used to be, not sure what I have done, it's almost like the lights are off in the drawing view. Any ideas?

Attached are two images one of my assembly and one of the drawing view, notice how dark the drawing view is. I've been haveing issues with my video card lately, (something has changed) not sure where to look to fix this.

SW 2011 SP4

Win XP

Nvidia FX1800