Macbook A1398 (820-3662-A) battery issue

[mrHat]

Hi. I have A1398 model with 820-3662-a board that shows "X" on battery indicator. Initialy the machine stopped powering on after the owner took it apart to fix the hinges. Then he took it to a technician who managed to make it power on but only with the charger pluged in. After that I got it. The battery is marked with an X and if I take off the charger the machine goes to sleep.
PP3v42 is present
SMBUS lines look ok
I get 11.5 V on CHGR_BGATE witch is pin 4 of Q7155 and I guess that does not alow it to open.
ISL and Q7155 chip have been changed, but I still get 11.5v on CHGR_BGATE.
I am not verry experienced with this but I am trying pretty hard so some help would much apreciated.
Than you.

 

[smiba]

Does it work with a known good battery?

Check R7151/52 resistors

Voltage of SMBUS_SMC_5_G3_SDA/SCL datalines with battery plugged in?

 

[dukefawks]

First thing you check is PPBUS. If it is 12.6V you problem is probably just a dead battery. If PPBUS is 12.3V then your problem is a dead ISL6259 and/or SMC.

 

[mrHat]

First thing you check is PPBUS. If it is 12.6V you problem is probably just a dead battery. If PPBUS is 12.3V then your problem is a dead ISL6259 and/or SMC.

PPBUS is 12.3V
SMBUS_SMC_5_G3_SDA is 3.4V
I guess both are correct.
As I said in my first post the ISL has been changed...twice.

 

[dukefawks]

Then the SMC is dead. Get one from an identical donor board.