[SOLVED]820-3437 no power

[peterfixit]

have an a1466 come in mysterious no power issue, customer said no water no drop etc
i open it and have a quick look, it looks fine, look closer C7371 exploded turned into a wire pushing ppbus_s5_hs_comp to ground
plugged in charger green brown light, started checking voltages, I start with pp5v_s5, this is 0.7 to 1V
no point in checking any other voltages if s5 is fucked
any ideas?

 

[ALB-Repairs]

Voltage at F7140?

This may be one of the rare instances that F7140 has blown. You need to start looking at the charging voltage before S5...

 

[peterfixit]

dude, you just made me $450, thank you. ppvbat/ppbus fuse who would have known

 

[peterfixit]

voltage was 0.8 volts, ohms was fine but OL on diode mode, there was also a black dot on the top, so replaced it and tested now is working

 

[ALB-Repairs]

Ohms was fine but it was diode was O/L? those measurements dont add up..
Anyway, no problem

 

[peterfixit]

yeah i know, I try not to think about it too much