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Replaced both. UF400 was cracked. After replacement corresponding port is stable at 5V. UF500 replaced because it was rebooting. Now amp meter wont turn on the corresponding port.

One CD3217 was cracked. Replaced it. Now the other port Amp meter is rebooting. have 2 change both I guess

PPBUS is cycling from 9V to 12.3V Stuck at 5V. With Fuse connected one port amp draw is significantly higher than the other. Removed the FUSE. F5200 I get 12.3V stable at C5255. Client said it just stopped charging and eventually the battery drained.

Solvable ?

Replaced all NANDS. Still the same. Didn't go to Recovery automatically. Getting Error 4042 on the AC2. Connected only board batter and trackpad.

Solved.

PP3v3_g3h short to ground. Injecting voltage but nothing heats up. Drawing a good 2.5 Amps

It doesn't go high at chime. R8360 across pins in 0.8 Ohms

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 ?

Apologies. both go upto 3.3V when chime

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

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

Replaced U1950. Now it's on. Should I replace R8164 or just keep the board running without it

EDP_PANEL_PWR is 0V also Pin 5 of U8300 is also 0V. no shorts

I check this morning. No Fan Spin. R8167 is not getting 3V at Pin 1

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

Diode Mode with LCD Connected is 0.493

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 ?

U1950 All are 3.3V But SYS_PWROK_R is 0.5V PM_S0_PGOOD is 0.2V

It back again. Now ALL_SYS_PWRG is 3.3V stable. The AMP draw is 300 amps and fan starts spinning but not turning on