Macbook A2251 820-01949 Stuck at 20V

Instafixx

Active member
Device came in for Display Replacement.
Display was replaced and it was working well for 3-4 hours - whilst awaiting passcode from the client.
They kept giving the same password but it was wrong.
Went into recovery and tried "My Password will not work " option.
Unlocked the SSD with the same password and reset the pasword.

After assembling everything back device suddenly wont boot. No External Display as well.
Disconnected everything - still the same.
20V and stable at 0.049 Amps ( Will go up initially but will settle at this - without battery)

PP2v5_NAND_SSD0 Present
PP0v9_SSD0 is present
3v3_g3h present
ALL G3S lines present.


EDP_INT_AUX_N is not shorted.

Thermal Imaging - Nothing Gets hot.

Tried DFU Revive multiple times - it is always successful and ends with a Padlock sign.

PCH_PWRBTN_L is 3.3V and there is a drop in pulse when Power Button is pressed but PM_RSMRST_L is always high.

Data can be erased but i didnt do DFU restore yet.

One strange thing L7210/20/30 showing unusual diode to ground value - all are around .250.
 
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