My friend brought me her MacBook saying that it wouldn't start. I thought it would be a simple fix, reset the PRAM or something..but I've done it all... I've unplugged/replugged, removed the battery, all of the above combinations. I've reset the PRAM, reset the Power Manager, removed and re-set the memory (which is all factory RAM). Nothing. No noise. No attempt to start. Nothing. Any ideas?