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820-2936, Green light but not charge the battery

punkieftw

punkieftw

New member
Hi, i have a macbook pro 820-2936 here.. the macbook power on normaly, with the charger, with battery and without battery. have green light. OSX recognizes the battery and the macbook can power on with a chaged battery. but the osx never seems the charged pluged and the battery never get charged.

here my measures




PPBUS_G3H @ F7040 is 12,53v with and Without bat

CHGR_ACIN 3,44v

CHGR_DCIN 14,07

U7000 Resistance between pin 27/28 : 20 OHMS

U7000 Resistance between pin 17/18: 03.3 OHMS

PP3V42_G3H 3.47




i replaced the u7000 but, same problem.

what do u thing?
 
punkieftw

punkieftw

New member
i have in diode mode
SDA 609
SCL 612 .. this measures are at pins of u7000

resistance mode
Open Line (O.L.)
 
punkieftw

punkieftw

New member
Duke, at pin 5 of Q7055 have some variables voltages.. i see 12,54v for 5 or 6 segs.. and decrease in 6 segs to 0,95v ... like: 12,54v (for 6 segs) and 7v, 5v, 4v, 2v, 1,5v 0,95v.. (6segs) And 12,54v again!
When the battery is pluged in, have 12,55v stable. but stills having only green light.

With a battery half charged, i have 10v in pins 5,1,2,3 and 3,03v in pin 4.. this is without charger and macbook running.
With battery halft charged and magsafe pluged i have 12,54v at pins 1,2,3,5 and pin 4 have 5v.

what do you thing?
 
Last edited:
punkieftw

punkieftw

New member
dukefawks said:
Replace Q7055 to rule that one out.
Click to expand...

I replace it and same thing. with and without the battery i plug the charger and i have green light, orange for a moment.. and again green light and stuck in green.
dont charge the battery.
what do u thing?
 
D

dukefawks

Administrator
How would this thing work if they had a short to GND. I mean they are short, not to GND. Just replace them....
 
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