820-3332 - ppbus_g3h low

[menatwork]

The Board is pretty clean.
All the rails is there, however, the PPBUS_G3H is around 12.13V To low and don't detects the battery.
Any hint?

 

[2informaticos]

Post exact voltage and dioe mode to ground on SCL/SDA lines of battery bus.
Also check resistance between pins 17/18 and 27/28 of ISL5259.

 

[JohnB8812]

And inspect for corrosion near the SMC

 

[menatwork]

2informaticos 17/18 = 4.3 (supposed to be around 4)
27/28 = 21.7 (was supposed to be around 20)

JohnB8812 SMC is pretty clean. I tested pins 10-11 ISL to SMC and is fine.

 

[JohnB8812]

12.13 is too low regardless. SMC_RESET_L voltage? If 3.3, then likely bad ISL6259 or bad SMC. If low, figure out why.

 

[2informaticos]

"Post exact voltage and dioe mode to ground on SCL/SDA lines of battery bus."
???
You are loosing time...