Hello,
I have the same problem. I haven't had the time to take mine apart. However in the mean time you can get the cable to charge the tablet if you elevate the charging cord right before the plug. By elevating the cord, it will make the contacts on your power cord connect with the port on your tablet thus letting the tablet charge. You can use anything to elevate the cord deck of cards, etc.
Just watch the top right of your tablet to make sure it is showing that the battery is actually charging.
It is a temporary fix. If when I get time I will take my tablet apart and replace the charging port. I will then post instructions here.
Sorry for the long post