I think that the screen on my Dell Latitude D520 looks a little darker than normal. I've tried to set the screen to the maximum brightness with Fn+Up.
Is there another way to make the screen brighter? I have Windows 7.
depending on your video adapter, you should be able to adjust brightness (gamma) and colours in the advanced display settings.
if the driver doesn't provide such a facility, use PowerStrip (shareware, $29, try before you buy).