got an acer aspire 3680 from a friend that will not power on. Apparently it just stopped recognizing the charger. I have tried another charger but it still doesn't work. My friend said he thinks a piece broke off, but I don't see anything. I'm guessing there's a bad connection between the dc jack and the motherboard, but is there a better way to test the jack? I have found a power board to replace it, but its $80 and would rather not spend the money if I don't need to.