It was my daughters laptop and it suddenly stopped working and wouldn't power up. I have purchased and tried a new power adaptor and a new battery, but to no avail. Originally when the power adaptor was plugged in, the green light on the power adaptor went out and when I unplugged the lead from laptop it came back on again. Now the green light on the power adaptor stays on (as it should)and I have got a green light on the laptop (I think it means power cable connected) but when I push the 'power on' button, the green light on the laptop goes off and after a couple of seconds it comes back on again, but still not a sign of the laptop powering up. Can anybody throw any light on this.