A1398 no green light, not charging

[2try’s]

Hi, I have 820-3787-A board that came to me with no power problem, it was blown u7190 and shorted u7100 that I replaced. After some troubleshooting I find out that something wrong my SMC and replaced it as well. Now machine is starting to work with around 1-1.5 A taking but only for 10-20 seconds, showing battery icon, then shut down and take 0.019 A. I tried with battery connected - same result and battery is not charging. Also I don’t have any light on MagSafe charger.

Ppbus_g3h - 12.57v
Pp3v42 - 3.42v

 

[2informaticos]

Did you take the SMC from donor board, exact same model?

Post U7000/1 voltages.
Did you terst known good DCIN board?

 

[2try’s]

u7000
SMC_BC_ACOK_VCC - 3.415 v
ADAPTER_SENSE - 0.712 v
SYS_ONEWIRE - 0.766 v

u7001
SMC_BC_ACOK - 3.245 v
SMC_BC_ACOK_VCC - 3.415 v
PP3V42_G3H - 3.430 v

SMC was taken from A1398 820-00138-A donor board
SMC itself have same marking as original one

Already tried nown good DCIN board, same result

 

[2informaticos]

Check diode mode to ground at pins 4 & 5 of U7000.
Be sure R7029 is good.

You should get the correct SMC, same donor board model!

 

[2try’s]

U7000
Pin 4 - 0.671
Pin 5 - 0.615

Is there any difference between SMC’s from same model but different revision of motherboard, even if marking is the same? Are they programmed differently?

 

[2informaticos]

They have different firmware.
If you get the board booting, then is possible to reflash the firmware with SMCTool free software.
But you need to get command line access; and not all models are supported.

 

[2try’s]

I tried 2 more different SMC’s before from unknown models with same marking, but PPBUS was having wrong voltage with them (12.4 or something like that) but only with this one it’s getting its 12.6v. Unfortunately I don’t have same donor with SMC on it at the time

 

[2informaticos]

You need to get correct SMC.
If you get access to command line, then is possible to reflash the SMC; if that model is supported by mentioned software.