My Sony Vaio laptop model VGN-CS110E wont stay on. I would turn it on and within a few minutes it would shut down by itself. Then I would turn it on again and it would shut down again. I don't know why it does this. There's power in it because I charge it and a light on the laptop indicates that it is plugged in. So does anyone know what is wrong with it and how I can fix it? Thanks 