I have had my dc jack fixed twice, within the last two months. Im starting to have problems again, but I dont know if its the jack or if it could be the head. The tip dosnet go in all the way, its a little bent. But when it is plug in the tip is nice and tight, the back end is kind of loose. I saw my laptop switch from dc to battery power, i might have tripped on the cord that connects from the wall to the adapter. Plugged it back in and I have power, but when I wiggle the cord it starts switching. Could the problem be the jack, or could it be the tip? Im I making sense, sorry if im not? OH DONT BUT ASUS, THEY ARE NOT WORTH IT. IVE HAD MINE FOR 6 MONTHS AND ITS A PAIN IN THE BUTT!!! NEXT TIME I THINK ILL GET ALIEN WARE.