Chosen Solution
My dock connector on my AT&T iPhone 4 stopped working and so I ordered a replacement and replaced it using the instructions on iFixIt. (Great instructions!) It now is charging when I plug it into a power outlet (which it wasn’t doing before I replaced the connector). I charged it overnight, and now am at work and tried to connect it to my computer to Sync, but it doesn’t appear as though the phone or the computer recognize the connection. The phone doesn’t show the “charging” battery and doesn’t show up in iTunes. I have tried using other cables, different USB ports, and different computers, so I am 99.9% sure it is an issue in the phone itself. Does anyone have any recommendations? Did I miss a connection somewhere? If it didn’t charge at all, that would make sense to me. But, it charges from an outlet, just not via computer, and it doesn’t connect to the computer either. Thanks for your help in advance!
Andy Rusch, sounds like a bad battery or power management IC. I would replace the battery and then re-evaluate.
There is probably an issue with the dock connector. I recommend replacing it with another one.