Hello guys, I have a very odd problem. I was changing my MBP 13" Late 2011 hard disk for another one bigger (750GB to 2TB), and as always I do something with my mac, I disconnected the battery. When done, I connected the battery back, but the mac won't turn on, no matter what I do. Also, if I connect the charger or the battery, one led from the battery indicator is stuck. This is a photo of what I'm talking about: Could this be the logic board mixed with some bad luck? Best regards.