Macbook Pro A1932 (820-01521-A) Stuck at 4.95V 30mA

[Junior†]

I have a customer that mailed me his a1932 (820-01521-A), all i know is that it is completely dead.

here are my measurements/observations

with battery/fan connected (connected to 65W charger):

top USBC port: 4.950V (starts at ~75ma, then settles at 30ma) note: sometimes this port has the same behavior as bottom port with battery connected (so 20v 0ma)
bottom USBC port: 20V (80ma for a split second then goes to zero)

without battery, fan is still connected:

top USBC port: 4.950V (starts at ~75ma, then settles at 30ma)

bottom USBC port: 4.950V (starts at ~75ma, then settles at 30ma)

RAILS:
PPBUS_G3H (C6483): 12.31V
TP[1]PP3V3_G3S_G3H_RIOL: 3.3V
PP20V_USBC_XA_VBUS(F3000): 5V (both fuses)
PPDCIN_G3H_CHGR_AMON (C7025): 5V
PP3v3_G3H_RTC: (C-3100/3200): 3.3V
I2C_PWR_SCL (R8080): 1.78v

I'm close to summing everything i've seen as T2 corruption based on this source: https://repair.wiki/w/MacBook_Air_A1...A_at_5V_repair

but I would like a second opinion or things I should check or do to get a better idea of what kind of problem we're dealing with here (I also don't have another mac at this very moment. I'll be able to give an answer if it's stuck in DFU mode later today when i have another on hand)

Thank you much in advance <3 (bring back the old badcaps emotes!!!!!)

[mon2]

Try with a fresh USB Type C paddle board. At the very least, clean the contacts with a Q-tip and IPA (alcohol; stuff from Costco pharmacy is great).

[Junior†]

Try with a fresh USB Type C paddle board. At the very least, clean the contacts with a Q-tip and IPA (alcohol; stuff from Costco pharmacy is great).

Hey mon2 ,

first things first,

I do not have a spare on hand, i'm going right now to pick up another macbook to test if it's in DFU mode.

cleaned the ports and the connector and it's the same behavior.

many thanks mon2

is there anything else I should check?

[mon2]

Confirm the voltage to ground on I2C_PWR_SDA to be sure it is not defective. Yes, could be T2 firmware issue.

Update - check this webpage:

MacBook Air A1932 Not turning on, pulling 0.03-0.06A at 20V repair - Repair Wiki

[Junior†]

I2C_PWR_SDA: 1.78V

won't be able to have that macbook again until Saturday but when i connected the macbook with apple config open on the working macbook it did not recognize it at all
I forget the error message but I think it's the usbc cable but i'm almost certain that shouldn't matter (i used the usbc charging cable from the other macbook)

odds are I told the customer it could be T2 corruption but I won't know until saturday, many thanks mon2 <3

[mon2]

A number of setup details must be correct before the Apple Configurator tool can work.

from what I recall:

1) the host MacBook must be on the same or higher operating system as the target non-working computer.

2) the port used on the target is important- 2nd on the left? Do confirm.

3) the usb c Cable must be fully loaded. A charge cable is not considered to be fully loaded. The usb cable must have all wires connected to allow for the data flow to/from the target device.

[Junior†]

I understand I have to look for one if not I'll charge the customer but I do have a couple i'll try before then. I'll keep you updated.

many thanks Mon2 <3