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820-2879 works on battery but not on adapter

S

sangolossyfon

New member
Hi I have a 2010 13' Unibody that will power on and run fine when a charged battery is connected but it does not run at all when just connected to the adapter nor does it charge the battery. Obviously this rules out G3H as having any problems and also the PP3V42_G3H does have 3.65 volts but still no light on the charger. There is an extremely faint green light actually but almost unnoticible. I have tried re-flowing the SMC with no luck.
Other voltages-
Charger outputs 18V to laptop and draws 3.5w from wall but green light still extremely faint
PPBUS_G3H does not get power when just charger plugged in
it gets about 11.8v when battery plugged in
when only charger plugged in-
SMC_BC_ACOK- 0.11v
SMC_BC_ACOK_VCC- 0v
SMC_ONEWIRE- 0v
Thanks for any help on next things to check!
 
S

sangolossyfon

New member
I don't know any history of the board but it doesn't have any water damage. The charger is 85w original apple and it works on other boards and has the full green light. If I were to test with PSU should I just set voltage to 18V and current to max and connect it to the board?
 
2informaticos

2informaticos

Administrator
Staff member
Original charger has an embedded processor.
If detects any leakage on the Mac's mainboard, will stop to deliver output voltage.
That's the reason I told you to test with fake charger; that one is not so "smart".
 
2informaticos

2informaticos

Administrator
Staff member
You can't connect power directly on the board.
SMC requires One-Wire connection!
I told you to use a spare Magsafe 1 cable; even 45W is good enough.
 
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