820-4924 no S4 state

[yobad]

Hello,
I have this board, water damaged, no power

PP3V42_G3H 3,4
PPBUS_G3H 12.59
PPVRTC_G3H 3,3
PP5V_S5 5
PP3V3_S5 3,3
SMC_RESET_L 3,36

PM_SLP_S5_L does have a ~3.2V pulse when first hooking power up. the pulse lasts about 20 milliseconds,

I soldered a wire on SMC_ONOFF_L and I touched to the ground
PM_PWRBTN_L and PM_SLP_S5_L don't react at the same time.
PM_RSMRST_L is high

 

[2informaticos]

If you cannot catch a drop pulse at PM_PWRBTN_L when trigger SMC_ONOFF_L, should be a SMC issue.
As always for water damaged boards, I recommend to start reballing SMC.
Do you get steady high PM_SLP_SUS_L?

 

[yobad]

yes i have PM_SLP_SUS_L

PM_PWRBTN_L drop when SMC_ONOFF_L shorted
SMC replaced no change

 

[2informaticos]

Check traces and components around SMC.
Also inspect entire board for corrosion.
Did you try to start in SMC bypass mode?

 

[yobad]

The board trying to start but it stop,
normally it consume 0.01A but suddenly it jump to 0.20-0.30A and to come back to 0.2
I can't find broken traces it is clean

 

[2informaticos]

"PM_PWRBTN_L and PM_SLP_S5_L don't react at the same time."
That is impossible, if the board tries to start.
You've also said
"PM_SLP_S5_L does have a ~3.2V pulse when first hooking power up"
Does it happen only when connect charger?
No reaction of any PM_SLP_Sx_L signals when trigger SMC_ONOFF_L signal?

 

[yobad]

sorry, I was wrong.
PM_PWRBTN_L react when I short SMC_ONOFF_L
PM_SLP_S5_L get high every ~10 sec for 20ms, but no reaction when I trigger SMC_ONOFF_L

 

[2informaticos]

Check for pulse at all big coils.
At same time of PM_SLP_S5_L pulse.

 

[yobad]

yes, there are pulses on the big coils at the same time PM_SLP_S5_L pulse.

 

[2informaticos]

Then you have pulses at PM_SLP_S3/0_L too.
VCORE tries to appear?
Also check if all voltages from page 63 pulse; one power rail may be shorted to ground.

"Did you try to start in SMC bypass mode?"
???

Any pulse at pins 7 & 3 of U1950?
You can also try a known good BIOS file.

 

[yobad]

PPVCC_S0_CPU 0.002 on diode mode

 

[2informaticos]

002 in diode mode means 4-5 ohms and could be good value for VCORE.

"check if all voltages from page 63 pulse; one power rail may be shorted to ground."
???

Pay atention to 5V filter caps for audio...

 

[yobad]

PPVCC_S0_CPU 0.3ohms
on page 63 all signals are pulsing and nothing shorted to froung

"Pay atention to 5V filter caps for audio..." where is this cap, sorry i am still learning

 

[2informaticos]

Look at schematic, audio area and there should be some 4.5-5v rails; C6412/22/32/42...