For some reason, my AC adaptor plug doesn't make proper contact with the DC-in jack. I have to use a rubberband to push it in deep enough to charge. The plug fits well, and stays in on its own, but without being pushed in a VERY tiny bit further, it doesn't charge. I've tried a new adaptor, and it was the same, so I know the prob is in the jack. Has anyone else had this prob, and how did you fix it? Was it the contacts inside the yellow jack? Which contact if so?