Sync fails:
The iPad "Mark's iPad" could not be synced because the connection to the iPad was lost.
iPad 2, iOS 9.3.5
Posted on Sep 3, 2016 3:17 PM
Q: I too cannot sync my iPad 2 that is running iOS 9.3.5 using iTunes 12.4.3.1
If iTunes doesn't recognize your iPhone, iPad, or iPod - Apple Support