I've recently come into possession of a powerbook g4, and I don't have much of an idea of what to do. It's one of those "you fix it, you can have it". I really need this, because I'm at college, and I need a laptop, and I can't really afford one. The thing that happens is, after I hit the power button, it turns on, and a question mark / sad finder flashes in the middle constantly. I was going to try putting in the Snow Leopard, but I realize it's wasteful because it won't install on PPC machines. So I put in the Leopard DVD, but it's an upgrade DVD, and it can't detect an older version. Past that, I put in the Tiger DVD, and whenever I load from DVD, it just crashes, and says to restart. Any suggestions, or anyone know what that flashing icon means? Thanks in advance.