820-00165 Quater fan spin

2informaticos

Administrator
Staff member
PLEASE, post more information.

The fan requires 5V_S0, so the S0 state is reached.
You've found missing S0 voltage, but didn't even tell us if that power rail is shorted to ground.
Also check if U8030 receives enable signal; the chip may be bad...
 

Soji

Member
The signal is intermittent. It’s on and off
There is no short to ground.
3v3 enable signal is intermittent too
Pm_slp_3_l is intermittent too. On and off
 

2informaticos

Administrator
Staff member
Try to put logic on your job.
We can't help, if you don't provide correct information.

12.2V and 12.5V (PPBUS_G3H) is totally different for MacBook boards; it denotes good (or not) communication between SMC and ISL6259.
As you make such errors, is also better to post voltage level instead of "present".

When you talk about a power rail, PLEASE specify it.
There are 3V3_S5/SUS/S4/S3/S0 lines.
What sould we understand when you say "3V3"???
 
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