If the Lightning cables work on other devices but not your iPad, then it's safe to say that you have a problem within your iPad. It could be just the Lightning port or it could be the charge circuit on the logic board. Both of these options will require micro-soldering so it's not a DIY repair.
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If the Lightning cables work on other devices but not your iPad, then it's safe to say that you have a problem within your iPad. It could be just the Lightning port or it could be the charge circuit on the logic board. You could follow this [https://www.ifixit.com/Guide/iPad+Air+2+Wi-Fi+Logic+Board+Replacement/47283|guide] to open your device a take a look-see but both of these potential repairs will require micro-soldering so it's not a DIY repair.
If the Lightning cables work on other devices but not your iPad, then it's safe to say that you have a problem within your iPad. It could be just the Lightning port or it could be the charge circuit on the logic board. Both of these options will require micro-soldering so it's not a DIY repair.