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i am sorry i was wrong, just tested it again no enable signal which ofcourse come from processor I am gonna stop with this board. Thank you for your guidence.

Ohhh so p5vso_en_l should be zero? p5vso_en is indeed 3v.

Hi there, Thank you for response, it is indeed the same board. i have checked the voltages, P5VS0_EN_L is 5.02v and P5VS0_SS is 4.95. i also measured other s0 power rails enable they are all present. what i find strange is that R7859 and R7879 supposed to be 100k resistence but it is not. i...

I have a macbook which dont go on. available rails are pp3v42, ppbusbus, s5 and s0 but no pp5v_s0. i already replaced q7940 but no result. enable signal is also available diode reading on pp5v_s0 is 0.409. power supply hangs on 0.089 amps. I am new to macbook logicboard repair and any help is...