iPad A2378 dead no charging

[waterchill]

anyway I will change the chip. Next update in about 2 weeks.

[mon2]

Current draw is 0,5A@5V when battery is connected

How was this current draw measured? Are you using a lab power supply for the battery function? What voltage did you apply if using a power supply?

Remove all power -> measure the resistance (not diode mode) to ground of the battery contacts. Someone is consuming this immediate current of 500mA since it is a spike. Respectively, is your power supply being current limited to the max of 500mA (0.5A) ?

[waterchill]

How was this current draw measured? Are you using a lab power supply for the battery function? What voltage did you apply if using a power supply?

Remove all power -> measure the resistance (not diode mode) to ground of the battery contacts. Someone is consuming this immediate current of 500mA since it is a spike. Respectively, is your power supply being current limited to the max of 500mA (0.5A) ?

I changed the chip without any result. But I found this. The 0,5A current goes to U0702. And here is the strange thing. On the C1819 is a short. You can measure it, but when voltage inject short is gone. Found out that every time I plug in the charger there is a short and after a time the short is gone. So I found out that the short is produced by Q7772. Unsoldered Q7772 short is gone and current draw and charging is much better but when plug in charger iPad freeze and goes black. Return to life unplug and plug in battery. Found that this mosfet can be found on iPhone X mainboard, actually not have. Will buy a donor and give a try. Maybe U7700 is also faulty What do you think?

[elecsoluces]

You have first change the PMIC, it's U8100?
I don't think it is the right way to troubleshoot this board, may be you're wasting your time.