I usually use an ac charger to charg but want to empty some videos/pictures to the desktop to backup but when I connect it, nothing. no charging sound/icon, no itunes loading. when I launched itunes it didnt recognize anything. used front ports/rear ports on pc (usb 3.0) but nothing. havent connected the phone in a while but nothing tried 2 different cable, nothing. works well with the ac charger but doesnt react to the phone with the pc. anyone know other options? I did try rebooting. power/home button hold. but it didnt do anything.