820-3476 No power

[G.Beard]

Hi.

Liquid damaged board, corrosion to U1900 cleaned up and replaced.

No S5 and no S5 enables.
PPBUS = 8.27V

Bad SMC?

 

[aprendiz]

PPBUS is with battery only or charger only or both connected???

 

[G.Beard]

PPBUS is with battery only or charger only or both connected???

Charger only.

I was thinking with no S5 enabes and PPBUS a little low it would be SMC. You thinking somethig else?

 

[aprendiz]

This is not "a little low" it is too low, check ISL area, sense resistors, Voltage on pin 2, seems more like a bad ISL than a bad SMC.......

 

[dukefawks]

8.27 is too low. Do you have a green and the orange light?

 

[G.Beard]

EDIT: answered but tiered, will check for sure in morning

 

[G.Beard]

Green only, one wire 3V3 no communication

 

[dukefawks]

Looks like SMC issue. SMC_RESET high? 3V42 checked?

 

[G.Beard]

SMC_RESET_L is high.

3V42 = 3V413

 

[G.Beard]

I ran it through the Crest UC which I think cleared some crap from the trackpad connector.

Machine working. Thanks for your helps guys