820-3209: Not seeing battery

[macRepairAmb]

Anyone have any suggestion. Have a MacBook Air 13 820-3209 that's not seeing the battery. I've tried a known good battery from another unit with the same result.

Only issue i'm seeing so far is the SMBUS_BATT_SCL which reads about 2.84v (3.4v on a good logic board) while SMBUS_BATT_SDA reads about 3.4v.

Ive replace U7000 and checked R5281 (which reads 3.4v on pin 1 and 2.84 on pin 2). The only thing i haven't done is pulled the smc. Just wanted to make sure there wasn't anything else i need to check or could be the issue.

And yes, there was corrosion on the board, which i ran through ultrasonic clean (took images of all corrosion before cleaning).

 

[macRepairAmb]

Both SCL/SDA have resistance measurement of 0.46Mohms and diode measurement of 0.569(SCL)/0.565(SDA).
Will be pulling the battery connector soon. Would you happen to know where i could find these particular type of connector. I had search in the past but could never find them.

 

[JohnB8812]

Pull from a donor board. Use heat from the bottom to remove it 450 celsius 120 airflow the other side of the board under the connector to get it to come off without melting the plastic.

 

[2informaticos]

Reball SMC...

 

[macRepairAmb]

Rebelled the SMC. This time SCL is back to reading consistent 2.84v and not swinging from 2.84 to 3.4 anymore.

 

[2informaticos]

Change the SMC...