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Hi , My Ipad mini is not charging anymore, no matter what usb cable I use ,I had a half broken usb cable, I think its unstable voltage damaged somthing, now when I plug in my new cable it detects it, because the “no battery, plug in your charger” shows up without touching any button,but it wont charge, https://support.apple.com/library/conten… (this is what happens when I plug in my charger) and sometimes the apple logo shows up and my ipad actually turns on(when I plug in the usb cable) with 2% battery, but even then it won’t charge, what is causing this problem?How can I fix it?

Time to take it apart and take a look at the lightning connector and associated components. Use this guide to get to your board.