Greetings. I have a Sony VAIO PCG-61611L. When you press the power button the light is on, but it won't start. However once the power button is on, if I leave the laptop like that for 5 minutes or more, when I press the power button for 5 seconds to turn it off, and then I try to turn it on, the laptop start to work as if nothing happened. Is like I have to warm it up before I can use it. Any ideas why?