Why won't my iPhone won't sync?
Phone stopped syncing. The USB ports are all working.
I use an iMac G5, never had the problem. Won't charge
or sync now. It charges at a wall socket but not on computer.
Try replacing your USB cable with a high quality one.
This happens with some computers, I have the same problem.
I'm not sure, but I think iPhones MUST be attached to USB2.0 ports, with a direct wire.
Try with a hub too.
I tried again, after I changed the display panel on my computer and it worked fine.
I don't know what did it but it works.