Ipad Mini Charging Issue

I replace Ipad screens in my business. I have had 2 Ipad Minis that will not charge when switched on, only when turned off. The symptoms are;

1. When first plugged in to charger the device powers up and the charging current rises to the normal charging current i.e. about 960mA

2. Then when the device goes to sleep, screen is blank, the charging current drops right down to 200mA, then 100mA, then down to 0.

3. If I actually turn the device off the charging current then rises back to 960mA and the device charges normally.

4. Power the device up, and the non-charging symptoms return. In other words, it will only charge when turned off.

As I mentioned earlier, this is the second Ipad mini with this problem. Apart from this the device works normally. Anyone seen this problem and have any solutions?

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Have you tried another charging port? Check the charging port if there is any damage inside such as missing, pushed down pins or any blockage that needs to be cleaned using a toothpick or something equivalent.

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