820-3115 No green light

Hello.
I have this 820-3115-A.
Initially turns on for 3 seconds and then off. Had a lot of liquid damage around and under U1800. I protected U1800, added flux and reflowed the area and cleaned with ultrasonic cleaner.

Then the board had the same issue and I noticed that U7000 was getting a little hot (noticed it with thermal camera) so I replaced it, after that PP3V42_G3H went to 4V so replaced R7021 and R7022 and PP3V42_G3H is ok again but no green light and no attempt to turn on, just takes 37mA.

I reflowed the SMC and no change.

Any suggestion?


Thanks!!
 
PPBUS_G3H: 12.65v
PP3V3_SUS: 0v

Q7820:
Pin4: 3.3v
Pin3: 3.3v
Pin1:0v

P5V_3V3_SUS_EN: 4mV


Doubt: I have some differences on the names on the nets between the boardview and the schematic. Is that ok? Should I look for another version?
For example. Q7820 Pin1is: PP3V3_SUS on brd and PP3V3_SUS_FET on pdf.

According to the schematic they are the same right?
 

2informaticos

Administrator
Staff member
Slight differences appear between Power FETs packages on Apple schematics and boardviews.
Use surrounding components to locate signals and power rails correctly.

Looks like missing PM_SLP_SUS_EN.
Check SMC_ADAPTER_EN, PM_DSW_PWRGD, PCH_DSWVRMEN, PM_BATLOW_L and PCH's RTC signals.
 
SMC_ADAPTER_EN: 4mV
PM_DSW_PWRGD: 40mV
PCH_DSWVRMEN: 3.22V
PM_BATLOW_L: 40mV
PCH_SRTCRST_L: 3.33V
PPVRTC_G3H: 3.34V
RTC_RESET_L: 3.34V


Thanks
 
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