So I was just browsing the internet one day on my MBP. I bought it this summer before school started. Now, this weird static scratching sound came from the upper left corner when I lifted the computer up. It also happened when it wasn't plugged in and it happened when it was plugged in. It's also happened with minimal movement. Do you have any ideas what this could be? I haven't been able to replicate the sound forcefully since it's really random. What should I do?