I've had my dell studio 15 laptop for about four months now. The only problem I've been having with it is that the screen tends to go completely black when I run too many tabs and doing a bit too much at once. Sometimes the laptop makes a really loud buzzing noise. Sometimes it just goes black and I would have to restart the laptop. I am most definitely sure that the sound is coming from the internal parts of the laptop. There are also times where I watch a video on firefox and my screen freezes up for a few seconds and returns me back to normal but the video is green, the audio still working. Anyone know what my problem is?