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PPBUS_AON is short on ground

PPBUS_AON = 0.37v 3V8_AON = 0v

USB C Ports taken from Exactly same model. Connected to the board without connecting board to the battery. Just board, USB C ports and USB charging cable shows 5v 0.00a.

Hi, We have MacBook Pro that has power consume 5v 0.03A. Now we removed board and it and show 5V 0.00A. Please advise what should we check next? Thank you

about every 3 second power goes to 0v in every circuit. so board does not start. is there anything else we can check?

Please check above measurements and let me know what you think.

U7700 L77A0= 0.6v L7740 = 1v L7740 = 1v

U8100 L8120=0.3v ~ 0.8v L8270=0.3v ~ 0.8v L82B0=0.3v ~ 0.8v L8100=0.3v ~ 0.8v L8110=3.6v ~ 6v L8280=0.5v~0.7v

PP3V3_S2 = 3.2v 1V2_S2 = 1.2v 1V25_S2 = 1.2 1V8_AON = there is no components and no voltage

RD610 PP3V8_AON: 3.9v ISNS_MPMUHS_P: 3.9v ISNS_MPMUHS_N: 3.9v PP3V8_AON_MPMU_ISNS_VIN: 3.9v RD620 PP3V8_AON: 3.9v~4.2v ISNS_SPMUHS_P: 3.9v ISNS_SPMUHS_N: 3.9v PP3V8_AON_MPMU_ISNS_VIN: 3.9v RD690 component is not in presence, nor patient nor donor. CHGR_PHASE2: 12V PP5VS2_SW: 5V

This should the power line and it is PP3V8_AON > 3.9v. Please advice which power lines I should test. There are many lines here.

We made a progress. We changed the chip U5700 and got 20V and 0.15A on USB C meter. It is kind a looping again from 0A to 0.15A. Is there anything we should check before we assemble the laptop and test it?

We have good working donor. We changed the chip U5340 with the donor and the same problem. The donor worked with patient U5340. So this chip works fine. What else we can check?

Here link from google drive https://drive.google.com/file/d/1FUyrfUb9ti6RiW7s2opUtgJ4XyAEtNjR/view?usp=drivesdk

Sorry we are still learning. It is just show 0.03 on the USB C meter.

Here is actiual video from my phone exactly what we see. https://we.tl/t-GC24Xlh9ID

download link from IR camera video https://we.tl/t-rZobUh29Vv

We observed that the chip U5700 (51C) getting hot. I applied some flux and heat it up to make sure that it sits there fine. After doing that the behavior changed and the chips starts to blink under thermal camera. It was sending pulsing to another chip which is U5340. This chip also pulsing. So...

We injected the power 1V and also 4V to the power rail and it does use any amps. It is not shorted. What can test else?

Should I inject the 4v to 3V8_AON power rail? Should I put limitation for amps?