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I have a iPad 4 to work on, the digitizer has already been replaced. The problem is, the iPad shows the red empty battery with the lightning cable at the bottom. Even when it is plugged, it still ask to plug the device to charge it. I tried to go into recovery mode on iTunes and it won’t work at all, iTunes won’t recognize the iPad. Anyone has an idea what could the problem be, I would like to try everything possible before needing to remove the digitizer. Here is a picture: I get this even when it is plugged which is weird because it should only show the battery and not the cable. Also, the screen flash every 5 sec before going back to the battery/lightning cable icon.

I would inspect the lightning connector. My guess is that there is either debris in the port, or some of the pins are bent/missing. If the former, you can generally clean it out with a small instrument, just be careful not to damage the pins in the process! If the latter, you’re more than likely looking at replacing the lighting connector Here’s the Guide for that replacement, if you feel up to the task.

Charging port is the most likely issue. try cleaning it out first, if that doesn’t work you will need to open it up. Depending on your soldering skills, it may be a difficult replacement, as the port is soldered by several pads on the motherboard. There is also the possibility of a bad battery, or the U2 IC causing the issue.

It’s not charging port it’s u2 charging ic