820-3332 missing PM_SUS_L

[ALB-Repairs]

Hi got an 820-3332 that came in with a shorted PP3v3_SUS and PCH power rail, replaced the PCH, short is now gone but im stuck missing PM_SUS_L.

PCH is soldered well and i never really have an issue during fitting, I changed the PCH once more just encase i got a defective chip or ran the profile to aggressively.

Still the same symptoms. PM_BATLOW_L missing. PP3v3_S5 Present, PP5v_S5 Present. PP3v42 Present, PPBUS_G3H present. Racking my head on this one. No fan activity atall and the bench power supply pulls 0.04A rather than 0.031A on other S5 boards.

 

[dukefawks]

PPBUS voltage?

 

[ALB-Repairs]

12.6v SMC_RESET_L is present aswell

 

[dukefawks]

Check everything on PP3v3_SUS, could be more stuff fried? Output of U7740? U7930?

 

[ALB-Repairs]

u7740 is no stuff on this board. SUS_PGOOD_MR_L is present,. PP3v3_S5 is present at U7930.
PP3v3_sus is not shorted.

 

[dukefawks]

3v3_sus also goes to the ROM chip, maybe that got fried. Pull it and see if you can read it

Scrap that it would not affect SLP_SUS creation

 

[dukefawks]

If you have a good board to compare I would compare all input signals to the PCH power management block on page 19.

 

[ALB-Repairs]

Yes, my personal machine is an 820-3332.
I will do some more measurements, this ones not a hurried job so i can take time.