iPad Pro 12.9 (3rd Gen)

Problem DescriptionSymptomsSolutionSource
Not charging, no power.- If you have a tristar tester or lightning breakout board you should test that before attempting the following.

- Test with a known good battery.

- Replace charge port.

- If the above didn’t help you likely have a dead tristar.
Source
Turns on but does not charge.Ampreader shows 5V 0A.- Try the above steps before proceeding, as this can still be caused by the port and/or tristar.

- Check for shorts near the USB-C controller IC CD3215C00.

- Check for shorts near the charging IC 343S00235.
Source
Doesn’t charge.- Ampreader shows 5V 0.14A.

- PP3V3_S2_ACE missing.
Usually caused by a faulty USB-C controller IC CD3215C00.Source