820-00615 no power

[Kyle93]

Liquid damage but previous repair attempt from someone else before arriving here. SMC area was messed with so started out by replacing SMC to rule it out. Board is drawing 50 miliamps

some voltages

PP3V342 3.42v

PPBUS_G3H 8.60V

PP5V_S5 5V

PP3V3_S4 0.460v

PP3V3_S3 0.460

PP3V3_S5 3.2v

What to check next?

 

[Kyle93]

What can cause PP3V3_S3/S4 to only to be 0.460V?

 

[2informaticos]

Could be residual voltage...

Do you get 3V3_SUS?
Post PM_BATLOW_L, PM_PWRBTN_L, PM_RSMRST_L, PM_DSW_PWRGD, PVH_DSWVRMEN and the 4 RTC signals.
Trigger SMC_ONOFF_L and check for drop pulse at PM_PWRBTN_L.
If yes, check for pulse at all PM_SP_Sx_L signals.