iPad do not charge and connect with USB

Hello,

i am very new to all of this ...

Some day i was not able to charge the iPad 3 or to connect it with USB to my iMac. First i test it with a new charging cable, but it did not help. My idea was that the Dock connector was broken. I have bought one at fixit europe and change it with the old one. But nothing changes. Then i was thinking it could be the battery pack, again i buy this too on ifixit. But also i have no luck, the iPad do not work.

Now my question. Do i need the iPad 3 U2 IC or the IC for New iPad 3 Power Manage Controller. First i have found here on ifixit, the other in a chinese online store.

Thanks for helping me and sorry for my bad englisch!

Best,

Mario

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