Hi, I have a MacBook Pro from around July 2010. Recently, I've been having some issues with my screen going black at certain times. I've been able to recreate the issue by trying to stream some television and trying to watch a video from my phone in Quicktime Player. (EDIT: Oddly enough, playing the ~10 second clip a few times will make the screen go black, but I tried playing a 2 min HD Green Lantern trailer on my desktop a few times and nothing happens.) (EDIT2: Playing the same clips from my phone on VLC player many times, nothing happens.) Sometimes, the audio of whatever I was trying to play seems to freeze and gets stuck or sometimes it just stops altogether. Every time this happens, I have to hold the power button down to reset it. The nearest Apple store is a bit far, so I was wondering if anyone can help me or has any idea what the problem might be. Thanks!