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820-3437 Missing ALL_SYS_PWRGD
- Thread starter tlough75
- Start date
You can't look at ALL_SYS_PWRGD when missing S3 voltages.
It requires sum of several S5, S3 and even S0 voltages.
3V3_S5/SUS stable?
Did you try SMC bypass mode?
Are you using original Magsafe 2 charger?
Post PM_BATLOW_L, PM_DSW_PWRGD, PCH_DSWVRMEN and all RTC signals.
It requires sum of several S5, S3 and even S0 voltages.
3V3_S5/SUS stable?
Did you try SMC bypass mode?
Are you using original Magsafe 2 charger?
Post PM_BATLOW_L, PM_DSW_PWRGD, PCH_DSWVRMEN and all RTC signals.
Last edited:
Post now PM_PWRBTN_L, SMC_ONOFF_L and PM_RSMRST_L.
Trigger SMC_ONOFF_L and check for drop pulse at PM_PWRBTN_L.
Trigger SMC_ONOFF_L and check for drop pulse at PM_PWRBTN_L.
tlough75
Member
So PP3V42 was shorted to GND. found that the SMC was causing it so I replaced it. When I fired it up it was drawing 500mA and fan spin. I turned it off and put the board back in to the chassis, turned it on and now it is drawing 23mA but I have an orange light. I swear this board is possessed...
Check if all PM_SLP_Sx_L signals pulse at same time.
And which is that chip???
ALL_SYS_PWRGD connects with a lot of ICs.
And it comes from PM_SLP_S3_L, through R8167.
The other chips and resistors can only pull it down to ground...
ALL_SYS_PWRGD connects with a lot of ICs.
And it comes from PM_SLP_S3_L, through R8167.
The other chips and resistors can only pull it down to ground...