This past weekend I was using my MBP (Model: A1260) and it was working fine. I closed the lid on it while I attended to other things and when I returned the computer wouldn't wake up from its sleep. This has happened before and I just did a hard restart. The problem is that is never restarted. Instead the fans would start for a second, the dvd drive would make its usual sound, and the hard drive would click... then nothing. I thought it might be the hard drive and replaced the drive, but still nothing. I took the memory out and it beeped consistently letting me know a major component was missing. This leads me to believe the logic board or the left i/o board is toast, but I don't know which one it is. I was wondering if there is anyway to test the components to see where the failure lies. Ultimately it seems like power is getting to the logic board, its just not maintaining the power to fully start up. I really am at a loss.