3gs charging problem

[Angelmh]

Hi I have an 3gs with a charging issue. It charged fine, and I woke up one morning and all of a sudden, it wouldn't charge. I tried several different charges, tried wall chargers, car chargers, and it won't even sync with my computer anymore. My computer doesn't even recongnize it, so I can't get into my itunes. But heres the weird thing, i have an external battery back, and I can charge my iphone that way through my computer or through the car or the wall outlet. How can my phone charge with that if it won't with the regular charger? Why will it only charge with the external battery pack? I am so confused, lol. I'm scheduled to have the charger port replaced, but I wonder if its even that?? Any help would be greatly appreciated!

 

[willerz2]

I second the port replacement. It might be because of age and wear and tear that it might be loose. Can't diagnose it 100% until you open it up and check.