Macbook A1466 820-00165

[Instafixx]

Device came in with intermittent shutdown and not charging issues.
Found R1955 /R1650 / R0620 all corroded. Replaced them. Now the shutdown issue is gone but the charging issue remains.
Device shows battery charging when charge connected but the percentage will not increase. Restart the machine and the battery percentage will increase drastically.
Remove the charger still get the BOLT charging sign.

 

[2informaticos]

Check SMC_BC_ACOK level, w/ and w/o charger connected (battery alone).

 

[Instafixx]

Only Charger 3.1V
Only Battery 0.3V

 

[2informaticos]

Check voltage and diode mode at SCL/SDA lines of battery bus.
Also check resistance (ohm scale) between pins 17/18 and 27/28 of U7100.

 

[Instafixx]

SCL/SDA Didoe Mode 0.557
Voltages 3.4V

Resistance Across Pins of U7100
17/18 is 3.5 Ohms
27/28 is 20Ohms

 

[Instafixx]

Please reply

 

[2informaticos]

You must have something else corroded; possibly underneath battery connector.