So, my MacBook Pro 13" 2011 was on a shelf for the last few months. Didn't turn it on, because I just didn't need it. Today I wanted to use it. Then I saw this... It looks like something quite literally exploded in there. Needless to say, it doesn't turn on and the battery doesn't show anything on the battery meter on the side. I'm contemplating opening the case out of curiosity, I'm sure I can't fix this. Any ideas what might've happened?