Chosen Solution
Will not charge. The inside of the charger is broken.
Sally Daniel, the charging port is connected to a flex cable. all you have to do is replace that. No soldering involved. Flex cable is available at places like this and many others
I don’t think the charge port is USB, it uses a mini cord that should slip over the contact.
i think you need to resolder that USB port go to ifixit youtube channel and check out resolder of USB port on SGS3, on SGT4 it should be the same i don’t think SGT4 has USB port on doughterboard (so you just replace that little piece ) resoldering that without equipment is nearly impossible you can buy tools and DIY but it’s gonna cost you a bit
