820-01987. solid 20V on charger, boot looping (no image, no chime)

[KootenayMacGuy]

Client was using their 2020 13" MacBook Pro and it gave a low battery warning, after plugging in the charger for one minute, there was a small "zap" sound emanating from the speakers, then the machine just shut off and never turned back on. Heres what the charger is doing:

Google drive video

I have removed the board from the case and its pristine, not even any dust. The PMIC is covered by a giant metal shield on this board which is pretty intimidating. Apple is trying to make repairs more difficult

When the unit first came in my shop I attempted to put it into DFU mode to restore the firmware but it would not recognize the keys being held down and would not enter DFU.

 

[2informaticos]

Is PPBUS_G3H stable?
Also check all AWAKE and SLPS2R voltages.

 

[KootenayMacGuy]

The client decided against board repair when I explained it may take some time to diagnose the issue. I reassembled and handed it back over. They will be sending it to Apple to replace the logic board.