820-3787 a1398 - Does not see / reconize / charge battery - liquid damage

Status
Not open for further replies.

820Slave

Member
Board runs well but will not recognize / charge battery.

All zeros in system profiler, yet when charger is removed it manages to successfully go to sleep from battery power.

I feel I'm close but obviously missing key things. Please see my marked up image to see all that has been tested. Both new and original battery with same results.
 

Attachments

  • photo1113.png
    photo1113.png
    93.7 KB · Views: 0
  • 820-3787 - U7100.pdf
    25.5 KB · Views: 0
Last edited:

nate8organic

New member
did you check SMBUS_SMC_BSA line? also don't take measurements in auto mode. use Either K or diode mode.

Its going to be the battery indicator, isl, or smc. or both.
 

820Slave

Member
pin 5 of J7050 SMBUS_SMC_5_G3_SCL .4v
pin 6 of J7050 SMBUS_SMC_5_G3_SDA 3.4v / .2v
with no batt connected

tested with 3 batteries
SMC very clean and LD not near there.
has been through UC
 
Last edited:

mrHat

New member
Hi. I have A1398 model with 820-3662-a board that shows the same problem. 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.
 
Status
Not open for further replies.
Top