How to fix an iPad that will charge when powered off but not when powered on

From Repair Wiki
How to fix an iPad that will charge when powered off but not when powered on
Device IPad Air, iPad Air 2 , iPad Mini , iPad Mini 2 , iPad Mini 3 , iPad Mini 4
Affects part(s) motherboard
Needs equipment microscope, soldering equipment
Difficulty ◉◉◉◉ Specialist
Type BGA, Soldering


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Problem description

Certain models of the iPad can develop an issue where they will stop charging while fully booted but will still charge while powered off.

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Symptoms

  • iPad pulls full amperage when the charger is plugged in (approximately 2.3 amps) then drops to zero amps when fully booted.
  • Disconnecting the charger while at full amperage then replugging shows zero amps.
  • Device automatically boots when the battery is attached.

Solution

This issue is almost always caused by a faulty PMIC. Replacing the PMIC corrects the issue a majority of the time.