820-3115-b faint green light

[dukefawks]

First thing to check would be PP3V42

 

[DannyRinc]

PP3v42 comes out at a steady 115mv

 

[dukefawks]

Come on, what do you check next? Short

 

[DannyRinc]

Sorry since my last post ive been just working on the board, I didnt meant to leave such a short reply. There was a short on U6990 which would drop voltage from pp18v5 to like 10v, replaced and voltage was steady pre-u6990 but 0v on pp3v42. Went ahead and replaced the SMC because fuck it why not right? And I got pp3v42 now. But I'm still not getting any g3h, and now u7000 isn't sending voltage to Q7030.

 

[DannyRinc]

I honestly figured the SMC was at least bad because it had bubbled on the surface, not just replacing to replace. Also I'm not sure how to check for a short on pp3v42 after u6990 since all I've ever seen is "put a psu through it and see what heats up"

 

[dukefawks]

So 3V42 is now present? Got a green light now? If not is ACOK present?

 

[DannyRinc]

no green light, acok is not present.

 

[aprendiz]

Seems a bad ISL6259....

 

[DannyRinc]

replaced it with a good one and nope, still no acok

 

[aprendiz]

Still no green light???? Check the soldering job..... voltage on ACIN?? Have you tried another magsafe??

 

[DannyRinc]

I've tried another magsafe, I've got 4v at ac-in. Solder is good on the ISL, I'm thinking maybe I gotta redo the SMC if there's a short on acok? I hope that's not what it is but I guess it's a possibility.

EDIT: Tested for a short to ground, nope! All good here.

 

[dukefawks]

Is the pull up resistor on the ACOK line good? R5087. Also check R7005.