My girlfriends acer aspire 5720 laptop has developed a charging problem. The laptop will stop charging all of a sudden and the power button and battery indicator will flash orange. When I plug the charger out the power button and battery indicator will go green and when I plug it back in and eventually get it to charge again the power and battery light will go constant orange. I was wondering if this is a charger problem or the dc jack or something else? Regards Liam