820-00165 Doesnt Boot. Green Under SMC

[Instafixx]

For My Reference Only 7542.

Macbook 820-00165.
Corossion Under SMC.
Cleaned and heated the SMC with flux and the machine turned on and worked for 2-3 hours.

So i went ahead and removed the SMC. Cleaned all the pads. Found trace betweeen R5117 and the SMC corroded. Reconstructed it too. But it doesnt turn on.
I get a fan spin on startup. then it stops. then again spins gradually to max.

No Voltage at R5117 / R5608 / C5602 .

C5433 is 2.3V.

I think some issue with SMC or the traces. What will be the best way to check it rather than being a wild goose chase.

 

[2informaticos]

Check diode mode to ground on that corroded line.
Be sure R5117 has correct ohm value; it requires 3V42 presence on the other pin.

Did you resolder correctly SMC?
Use leaded paste for balls.

Check if machine starts in SMC bypass.

 

[Instafixx]

the corroded line was reconstructed via jumper wire.
R5117 has 3.4V on the other pin.

Ohms Value to Ground.

Pin 1 is 21K Ohms and increasing
Pin 2 is 170k Ohms and increasing

Ohms Value Between Pin 1 and Pin 2 is 100 KOhms - Stable.

SMC Bypass results in the max fan spin as it should but the machine doesnt switch on.

 

[2informaticos]

Do you get voltage on CPU core coils?
PLT_RESET_L comes high?

Inspect for corrosion all SPI Bus Termination resistors and their traces.
Clean J6100, if needed.

 

[Instafixx]

Removed the SMC and checked all the PADs. The top 3 lines diode mode readings are totally out of range barring 2-3 pads.

Example
SMC_OTHER_HI_ISENSE is 0
SMC_CPUVR_ADJUST_ISENSE is 7.7.
SMC_TDO is 2.7

The upper portion of the SMC had the green corrosion.

Do we have to reconstruct all these traces ?

 

[2informaticos]

Rebuild all traces and check all components connected on them.