4s Only charges when turned off, not recognized by itunes

I changed the docking connector but no luck, the problem persists. Is there anyone out there that has any advise?

hi I have the same issue and the docking port was buy from Ifixit, my iphone is 4S.

"I also have an iPhone 4S that only charges when it's turned off and is not recognized by iTunes. I just replaced the dock port and that didn't fix the problem.

Phone broke when I tried wiring a USB cable and got the polarity backwards. From my reading, it seems possible that either the replacement dock connector was bad (cheap part from China) or the logic board needs to be replaced. Something about the logic board having a small fuse that may have been blown.

Post if you figure it out."

"I replaced the battery, I replaced the docking connector (in a service store), I already made a reinstall. Sometimes it charges, sometimes not. If it recognizes a new device where it's charged from, or a new cable, it works fine for the first time. After that it doesn't charge neither. This problem seems to be a software problem for me.

I'll try a clean install maybe this week. A total factory reset. And installing all my apps and contacts manually, not from backup. Let's see what happens.

Another additional info: my iPhone 4s is 4,5 years old, I already replaced display and power button a year ago and worked/works properly except of this new issue."