A1278 820-2936 not charging

hgoncalves

Active member
I have an A1278 820-2936 that it's not charging the battery.

I get 12.56V on F7040
12.56V on PPVBAT_G3H_CHGR_R

On U700 i get 4.6V in CHGR_ACIN

Can you help?
 

2informaticos

Administrator
Staff member
Do you get green light on Magsafe?
Did you test disconnecting BIL?

Post voltage and diode mode to ground at SCL/SDA lines of battery bus.
 

hgoncalves

Active member
Yes, I get green light and I disconected BIL.

Diode:
SCL = 0.528V
SDA = 0.525V

Voltage:
SCL = 3.4V
SDA = 3.4V
 

2informaticos

Administrator
Staff member
Is the battery recognized at least?
Posy PPBUS_G3H voltage with both charger and battery connected.

Did you try known good battery?
 
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