I have probably the same issue on my iPad Air 2, 64GB WiFi, iOS 12.3.
It started when the charging cable was shorted a couple of weeks ago.
I have a USB power meter so I could verify that the cable was shorted and I can also see when the iPad is draining power from the charger or not.
When it stops charging, it remains like that until the next reboot so the software is disabling the lightning port completely until then if it detects an error.
If I power it off and have it plugged in when it stops charging, it reboots automatically as it would if I would plug the charging cable while it was powered off.
However, in that case it will stop charging again before it completes booting up.
To charge it again I’m doing the following steps:
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* I unplug the cable from both the iPad and the charger
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* I unplug the cable from both the iPad and the charger
* I power on the iPad and wait for the pin screen
* I plug the cable first on the charger and then on the iPad
* At that time, the charging icon becomes green and the battery charges.
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* After I give the pin, it will either continue charging silently (the icon doesn’t show that it’s charging but I can see it in the USB power meter) or it will stop draining any power so I’ll have to repeat the process.
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* After I give the pin, it will either continue charging silently (the icon doesn’t show that it’s charging but I can see it in the USB power meter) or it will stop draining any power so I’ll have to repeat the process which is obviously really annoying.
Sometimes I get the error “This accessory may not be supported” but most of the times it stops displaying the charging icon silently.
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Once it drained all the battery and it got stuck in a loop o booting, reading the pin screen for a couple of seconds with battery at 2% and rebooting over and over.
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Once it drained all the battery and it got stuck in a loop of booting, displaying the pin screen for a couple of seconds with battery at 2% and then rebooting over and over again.
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To exit from that situation, I managed to get it in DFU mode and I left it there for a few hours to charge to 100% while it was in black screen. The recovery mode didn’t work when I tried it.
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To exit from that situation, I managed to get it in DFU mode and I left it there for a few hours to charge to 100% while it was in the black screen using the Macbook USB port. The recovery mode didn’t work when I tried it.
I’m going to replace it soon but at least these workarounds can postpone the need for replacing it at the moment since it’s not completely dead.
I have probably the same issue on my iPad Air 2, 64GB WiFi, iOS 12.3.
It started when the charging cable was shorted a couple of weeks ago.
I have a USB power meter so I could verify that the cable was shorted and I can also see when the iPad is draining power from the charger or not.
When it stops charging, it remains like that until the next reboot so the software is disabling the lightning port completely until then if it detects an error.
If I power it off and have it plugged in when it stops charging, it reboots automatically as it would if I would plug the charging cable while it was powered off.
However, in that case it will stop charging again before it completes booting up.
To charge it again I’m doing the following steps:
* I unplug the cable from both the iPad and the charger
* I power on the iPad and wait for the pin screen
* I plug the cable first on the charger and then on the iPad
* At that time, the charging icon becomes green and the battery charges.
* After I give the pin, it will either continue charging silently (the icon doesn’t show that it’s charging but I can see it in the USB power meter) or it will stop draining any power so I’ll have to repeat the process.
Sometimes I get the error “This accessory may not be supported” but most of the times it stops displaying the charging icon silently.
Once it drained all the battery and it got stuck in a loop o booting, reading the pin screen for a couple of seconds with battery at 2% and rebooting over and over.
To exit from that situation, I managed to get it in DFU mode and I left it there for a few hours to charge to 100% while it was in black screen. The recovery mode didn’t work when I tried it.
I’m going to replace it soon but at least these workarounds can postpone the need for replacing it at the moment since it’s not completely dead.