So when I first turn on my laptop, I can hear the fan running, but the screen doesn't come on. If I rock it back and forth for a bit (sometimes just a few seconds, sometimes several minutes), the screen comes on. I've tried connecting it to a monitor and it worked fine. Anyone have any idea what could be wrong/how to fix it? My first thought is a loose cable, but I don't want to crack it open based on a hunch.