820-3332 Missing PM SLP S5

This board is not liquid damaged

I have seen 4 3332 that show these same symptoms most liquid damage but this one isnt.

PPBUS G3H is 12.4v
3v42 is 3.42
3.3v S5 is 3.3v
Computer will boot in SMC Bypass with no issue

Has no PM SLP S5 3.3v when charger is plugged in. Reballed SMC and checked pull down resistor for the SLP S5 line. All fine.
 
Replaced SMC from Donor board same issue

IDK if its related or if SLP S5 is needed before this but the 3v3 and 5v SUS rails are 0v. Missing SUS EN line
 
Well currently I have managed to go backwards. I now have 5v on G3H so trying to figure that out now. ISL current sense resistors read fine
 
duke I love you. Evidently my old 85w is taking a shit and thats why it worked intermittently.
Got a new one to test with today and it boots up. Hopefully not a coincidence and it was the charger.
 
Is the 15" dependent on the extra current available to boot or is it a signal line coming from the brick? It might just need a new cable end if its a signal issue
 

dukefawks

Administrator
The magsafe tip has a one-wire EEPROM in it. The system needs to see a valid charger before it will power on. So you just need an 85W charger and all macbook will power on from that.
 
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