I left my Macbook (late 2008, 13-inch aluminum, Snow Leopard) in sleep mode last night and when I woke up this morning I opened the lid and the screen started flashing rapidly, I decided to turn it off (holding the power button) and now the Macbook won't turn on at all. I plugged in the charger and it has a very, very dim green light on. I tried to check the charge by pressing the side button and no lights turn on at all. When I press the power button the caps lock LED turns on with a very dim green light (just like the charger, you can only see it in a dark room), but the computer does nothing at all. I tried using cmd+power button, removing the battery for 30 minutes, and nothing seems to work. I've had the computer for almost 4 years now and never had a problem with it, never spilled anything on it. I formatted it a month ago cause it was starting to get slow, and I upgraded the ram to 4gb two years ago and that never caused me any issues either. I'm clueless here. Any ideas?