Chosen Solution
I work in a small PC repair shop in Denmark. Today a costumer came into the shop with a Late 2013 13” Macbook Pro retina The costumer has gotten the battery replaced at another shop (they have closed down recently). But the issue is that the MagSafe charger is blinking green and the battery is not charging I have tried SMC and NVRAM resets, with no luck. I then tried changing the battery out for a new one, also with no luck… Swapped the I/O board out with a new one, but it is still blinking green on the MagSafe connector… Also tried a few different MagSafe’s, both 60W and 85W.. I ran a sensor-test with TechTool Pro and it shows an error called “PBUS Rail 0 - 16,68V” The computer will boot without the battery connected, but as soon I connect it everything dies and won’t boot again. I have run out of ideas, and am looking for someone who has experience with this problem and how to fix it.
Well the error: “PBUS Rail 0 - 16,68V” is a good lead! Thats telling us the logic board is having problems. You’ll want to get schematics and boardview for this logic board. Do a Google search for the board number 820-3476 which I believe is the one you have (double check). You should be able to find them. With them in hand you should be able to isolate out the circuit PBUS. Louis Rossmann offers some very helpful video’s which can explain things better than I can here: Macbook Pro Retina dead no power due to bad current sensing circuit
