Chosen Solution
My macbook retina won’t turn on… I tried to reset NVRAM and SMC but nothing. I tried to replace the battery but still nothing. when the mac is charging, the entire logic board is cold except the component in the red box.
I believe it is inductor (R36 219 CCF ) , I have not been able to find more information and I do not know where to find the replacement. can anyone help me? I think it may be a problem for that component. I accept any other suggestions to fix my problem and turn my macbook back on. ;) tnx jack update component L7520
The inductor won’t be the reason why it is turning on; you can see MacBooks with rusted inductor casings and they will still not need replacing. Measure voltage on both sides of this inductor, it is simply passing voltage through it. If you get voltage one side and not the other, then there is an issue. If you are getting no volts on both side, the CPU is not turning on, since this is one of the voltages required to power the CPU. This component has no pathway to ground, but it may have 15ohms+ resistance to ground, since the CPU has a low resistance to ground. If it has a dead short, then the CPU is probably dead. If you are confident in replacing the soldered components on the logic board, find the board number (bottom left of logic board) and Google for schematics and a board view for that, and I can guide you. If you have never done this before, and have no intention of potentially making the issue worse, take it to a 3rd party repair company who specialises in logic board repairs and they will check this out.
I’m not sure if the inductor is the root issue here. This maybe more a signpost (symptom) of your power issues. I would review the schematics and trace out the power rails to see what is not getting power and see why this inductor is getting to much current (short to ground?)
