I had a game running and some downloads and a few other things open, so quite alot on my new mbp 15" i7. I got it friday. I left it for about twenty minutes, and when I came back it had shutdown, and wouldn't turn on. It had been on downloading all night and was plugged in. Now when I plug it in nothing happens, and the battery button gives me one blinkng light, and it won't turn on. Please help me. Btw, I had changed my Hdd the day I got it, but that was working fine.