iPhone won’t sync to iTunes: disconnects during sync.
A few days ago, my iTunes started giving me messages like “iTunes could not sync contacts to the iPhone “My iPhone” because the iPhone disconnected.” It wasn’t syncing anything to the iPhone anymore.
After reading this forum thread I tried resetting the sync history in the iSync application preferences. This did not help and instead caused iSync reminder messages to come up every few minutes.
I also tried syncing the iPhone with all the “info” selections unchecked, and then finally replacing all info on the iPhone by checking “Replace with information from this computer” in the Info tab in iTunes. This last change seemed to work, but I realized later that something else had probably helped fix it:
I’d had a USB hard drive plugged into the same USB hub as my iPhone for the last few days, and when nothing else was working, I finally shut it down and unplugged it. So there was more power for the iPhone coming from the hub. It is a power issue.
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