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iPad mini 2 have charging problem

I have a iPad mini 2 here not charging.

It turns on everything but it does not charge.

Changed the battery, charging port, and charging ic.

All of the parts work cause I tested each part on another working device.

When I plug in the charger and turn on the device, it shows it's charging but it's fake charging. When I unplug it and plug it back in, it does not charge again.

I have noticed how the voltage drops when athe battery is connected to the device. When a cable is connected to the port, L5700 shows 5v.

With battery drops to 4v and when the device is turned on, its 3v, despite the charger plugged in.

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投稿日: 2018年4月5日

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PPVBUS_USB (L5700) should not be dropping down to 3V when charging (or even 4V for that matter). To things could be going on here:

The power source (charging brick or USB port) can't supply the necessary current and is being current limited , hence dropping the voltage.
The power source is fine but the device is drawing excessive current due to a short or partial short somewhere.

If you have access to a USB Ammeter, you could use that to determine if the device is really drawing current when it says it's charging.

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The tablet automatically turns itself on when the screen and the battery is connected to the motherboard. Could this be one of the problem?

Sarbear さんによる2018年4月6日

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iPad Mini 2 LTE

iPad mini 2 have charging problem

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