i have a acer aspire 5472 while plugged in it quit charging the orange light was not on and the battery got low and powered off. my daughter having the exact same laptop I used her power cord and it worked light came on and it charged to 100%. when I unplugged it it quit working so I plugged in my cord and it was working. when I unplugged it it quit working and hers started working. so now when one quits working I swap powercords and so far the other always works.... any ideas whats going on... I have tried pulling the battery and holding down the power button for 20 seconds and powering up that way but no change...im at a loss here