SXPS 1645 charging problem

I have SXPS 1645 replacement from 1640 back in October 2010 and my laptop is experiencing an odd problem. Since May 26, the laptop is unable to recognize and charge the battery. When I plug the AC in, it's as if no AC is connected at all. No messages saying that it's unable to charge or anything. It runs fine with the battery though.

At first I thought my AC adapter was at fault so I ordered a new one but still unable to charge. So now I'm thinking that the DC jack that connects to...

SXPS 1645 charging problem

SXPS 1645 charging problem