820-3115 slow charging

macfix

Member
Hello Everybody

Working on A1278 820-3115 with slow charging problem ( System says 10 hours for charging time). SMBUS_BATT_SDA is surging 3.4v to 3.1 v , SMBUS_BATT_SCL is surging 3.4v to 3.3.

tested known good battery and magsafe board. Disconnected BIL CONNECTOR

Replaced SMC,U7000,r5280,r5281,Q7055,R7051,R7052 nothing changed :(

Any idea for next step check?

Thanks
 

macfix

Member
dukefawks 17/18 resistance is 4ohm, 27/28 is 22ohm.
and tried 2 different charger.
Note: all time plugged charger machine turn on also battery connected (its should be only one time when battery disconnect and pluged again machine)
 

macfix

Member
Yes dukefawks machine starting from battery and working but only slow charging problem and yes few months ago replaced keyboard from liquid damage :(
 
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