Iphone 4s charging only when turned off - not recognized by pc
I've found an iPhone 4s 16gb black, tried to return it to the authorities and was told that since its wasnt reclaimed by the owner i had to keep it. Same answer from the Apple Store.
Since I'm keeping it id like to fix and use it.
The problem is that the phone isn't recognized by the PC (windows 7), I've tried many cables (even genuine apple ones), tried uninstalling and reinstalling iTunes again but nothing. I've been trying several PC of my friends and still nothing.
Another thing is that the phone doesn't charge unless turned off and connected to the PC.
I don't know the origin of the phone , wether was jailbroken or not. Some friend told me the phone was before jailbroken and when got restored it came in this condition.
Any ideas or thoughts are highly apprisciated,