Macbook A1466 820-00165 Intermittent Fan Spin

[Instafixx]

For my reference SSRB2
Device came in certain resistors misisng. R5115 etc.
Installed them back.
Now i get magsafe and random fan spin for 1-2 seconds.
Draws upto 300mAh and drops and again up.

PPBUS is 8.59.
PM_SLP_S4_L is missing.
ALL_SYS_PWRGD pulsing as well.

 

[2informaticos]

Fan can't spin if PM_SLP_S4_L stays low.
Trigger SMC_ONOFF_L and check for drop pulse at PM_PWRBTN_L.

Did you try SMC bypass?

 

[Instafixx]

Yes there is drop in pulse.

Same behavior is SMC bypass mode as well.
Fan spins and off and spins and off.

 

[2informaticos]

Fan spins always when trigger SMC_ONOFF_L?
Check ALL_SYS_PWRGD behavior?

Compare diode mode to ground on CPU coils with good board.

 

[Instafixx]

Fan Spins/Pulses always irrespective of whether you trigger SMC_ONOFF_L or not.

Currently the fan isnt pulsing but ALL_SYS_PWRGD pulses every 5 seconds. So does PM_SLP_S4_L

 

[2informaticos]

820-00165 Pulsing - LogiWiki

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