Macbook Pro Turns on but doesn't start up
Okay so I have a 2007 Macbook Pro with OSx Leopard I believe. It will turn on and chime and then bring up the apple logo and the loading spindle, then it just freezes and ventually turns off. Any thoughts? I have opened it up and checked everything out and it all seems to be in functioning order
MacBook Pro, Mac OS X (10.6.8)