I just bought a new HP g4-1215dx laptop. When I’m running on battery and have the brightness turned down, I notice that as I scroll around on webpages that the brightness will change depending on what is on the screen. For example, when scrolling from a part of the page that has a white background, to a part of the page that has a black background, the screen brightness will change. It is really distracting and annoying. It does not do this if the brightness is turned up all the way. Is this machine defective, or are there some settings I could change to stop this? Otherwise I am fairly happy with this laptop, so I would keep it if I could figure this out. Thanks in advance.