820-3476-A Won't Charge Battery/Run Off Charger

[JohnB8812]

Replace the ISL, Q7130, and Q7155 all at the same time. Also double check all traces under and around Q7130

 

[jadao]

You can also check scl/sda lines diode mode, they should be really close one each other, usually around 0,489-0,500.
Check resistor values R5380, R5381.
Check for any short on both lines.
Make sure U7100 is well soldered.

 

[CRC2018]

Thanks for your replies - can confirm after having replaced Q7180, U7100 and Q7130 again and also running a jumper wire for CHGR_PHASE from L7130 to C7125 the macbook is now charging and producing 12.3v PPBUS from the charger as normal.

thanks for your advice.

 

[2informaticos]

"producing 12.3v PPBUS from the charger as normal."
That is not normal!
Unless your multimeter doesn't read correct.

Battery is charging?

 

[JohnB8812]

12.3 is a little low is this off battery power? If not, does it charge recognize and run off the battery?

 

[JohnB8812]

Gotcha then yeah for SURE get a new meter! It could cause issues on future repairs but good job fixing it!