Macbook A2485 Drawing 5V No Amps

[Instafixx]

Removed the Fuse. PPBUS is .120 and PPBVAT is .453.
Is I shorted ? I injected voltage and not drawing any amps. (0.002)

I removed RD590 and PPVIN_P3V8AON jumped from 0.120 to 0.450 which is the correct range as per openboarddata. Hence I feel there is a short. How to proceed ?

 

[2informaticos]

820-xxxxx code?
What fuse did you remove?

 

[Instafixx]

820-02100
The PPBUS Fuses.
Both PPVIN_5VUSBC are also 0.110 diode mode to ground

 

[Instafixx]

FYI I found little green on one of the caps of the PP3V8_AONSPMU line. No shorts but still replaced it.
Removed both fuses and I get 12.35 on Pin 1 of the Fuses.
Problem is on the PPBUS side but sadly it is not pulling any amps. I went as high as 4V. Still no amp draw

 

[2informaticos]

Compare diode mode readings on PPBUS_AON with secondary power rails derived from it.
I mean 3V8_AON, 3V3/5V_S2, etc...

 

[Instafixx]

3v8_AON is .370
3v3_s2 is .458
5V_S2_MAIN is .450
1v2_AON is .670
1v2_s2 is .280
1v8_s2 is .260

 

[Instafixx]

I tried increasing and decreasing the voltage continuously to find a slight heat spike in one on the Audio ics.
Removed. Short Gone.
The ics in these are SN012776. Is it universal with TAS5770 of the M1 models ?

 

[2informaticos]

If has the same pinout, you can try...