Chosen Solution
After repairing my wi-fi component on the motherboard with some heat, the device turned on when I plugged it on the cable (original), but it wouldn’t charge. I’ve tried connecting to my computer, still no answer, also tried 3 other cables but nothing happens. I’ve already tried changing the dock conector and the battery. What else should I try? I believe that the problem is in the motherboard, I wonder where and how can I fix that problem ASAP. Thanks for your time.
What about the U2 IC? That might be it. UPDATE 7/21/2016
U2 IC