820-3209-a missing PM_SLP_S4

[MegaObi]

Hey guys I need help troubleshooting this one. Not sure where to start.
I got green light ppbus_g3h 8.6v pp3v42_g3h 3.4v
pp5v_S5 and pp3v3_s5 present also.

 

[2informaticos]

Post SMC_ADAPTER_EN, PM_BATLOW_L, PM_SLP_SUS_L, 3V3_SUS, PM_RSMRST, PM_PWRBTN_L.
Trigger SMC_ONOFF_L and check for drop pulse at PM_PWRBTN_L.
PM_SLP_S4_L should react at same time.

 

[JohnB8812]

Yes check all of those. Also, is PPVRTC_G3H present?

 

[MegaObi]

Hey there guys.

ppvrtc_g3h 3.3v
smc_adapter_en 3.39v
pm_slp_SUS_l 3.34v
pw_pwrbtn_l 3.4v

pm_batlow missing
pm_rsmrst_l missing
3v3_sus missing

pw_pwrbtn_l pulse
pm_slp_s4_l NO pulse

 

[MegaObi]

found out it was r7821 - shorted
i replaced it everything is working so far. will run asd and see if everything pass.

i got fan spin and chime.

 

[2informaticos]

"found out it was r7821 - shorted"
You mean open; it is 0 ohm, just a short...

 

[MegaObi]

yes open it measured like 4million ohm
wasnt chiming too but after few resets it came back so happy little macbook