Not charging even after port replacement

Hi there

Had a friend take his Slate 7 in for repair as not charging, they "fixed" the port and it worked for a couple more days.

After this he asked me to take a look at it as it still wouldn't charge

The repair place rather than change the port tried some kind of jumper with copper wire.

I ordered a new port and attached it today to no avail. i've ordered a new battery and its on its way but any suggestions or advice as to the problem would be appreciated.