a few days ago it works perfectly.. but today i cant see my ipad appear on itunes.. any helps regarding on my problem? if you guys can help me A.S.A.P. it would be glad for me...
I run into this problem on occasion and what I do is - quit iTunes, reboot my Mac, restart the iPad and then try again. It might be that simple for you. It's worth a try anyway.
Here is the basic trouble shooting for the iPad. Your exact issue appears in the support list.
Give it a go and hopefully it helps!
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