Default [Q] Help micro USB port

Hello
I had a problem in charging port for my galaxy S3 i9300, and I take it to a store who repare it and it's charging now, but the problem now is transfering data cause my PC is not detactable at all, I've changed many software, cables and PC ports but there's no indication in my phone ( USB icon) which means it's a hardware issue in my phone.
My question is how I can test it I mean which pins must I test cause the phone connector has 11 pins? I can't take it again to repare cause I'm still using it.
Thanks a lot
Attached Images
File Type: jpg iCqoaDSRNCQg8.jpg - [Click for QR Code] (10.7 KB, 13 views)