I have a G320 laptop and it's not turning on anymore. When I press the power button, the light comes on for a few seconds and goes straight back off again, and when I plug it in, the light to show it's plugged in comes on, the battery charging light comes on, but when I press the power button, they all go off. I have no idea what's wrong with it tbh, was working fine before. I can hear a whistling type buzzing sound comming from it when it's either plugged in or I'm pressing the power button, but it's just not powering up. Anyone have any ideas of how to fix it? Would be much appreciated.