820-2915-B Green Light No Fan Spin

[Kyabbage]

Green light on charger, battery is present bot not charging. I'm very new to troubleshooting macbook boards and so far I've just been farting around probing voltages & getting nowhere in boardview. Any suggestions on where to start?

 

[2informaticos]

You have several problems there; try to fix all.

"3(0v)"
Missing ACIN, very important.

"27/28(9.6k ohm)"
Check R7020/21/22 abd their traces.

"1(6v)
------------
27(0.9v)"
Result of missing ACIN...

 

[Kyabbage]

R7020(0ohm across?) all traces good, 21(2k, Traces good), 22(6.5k, Also good). voltage on that rail starts at 1.4v but falls slowly to around 0.15v.

 

[2informaticos]

R7021/22 MUST be 10 ohm each!!!

 

[Kyabbage]

Ok now they are 10 ohm each, finally got a donor board in and replaced them.