Yesterday I was just using my old macbook pro for browsing the web like any other day. I shut the lid and went downstairs to get a drink and came back up and nothing happened when I opened the lid. Tried to do everything I could to no avail. Now when I start the Macbook the optical drive makes the normal noise it always has on start, and I can hear fans running, but that's it. No startup chime, black screen. No illuminated keyboard, lights dont come on for caps lock/num lock keys. Anyone know what the problem is?