Ok i think I found from where it is. And its probably the battery that i bought from Ifixit. The photo is a bit blur, but on the circle red, you can see that the ‘cable’ is a bit cut. This part is normally hidden, but i try to put it out carrefully to look at it, because i was seeing a little weird things and there is like a tiny cut… Dont know if it could be reason of that, but its probably that, I will contact now Ifixit… UPDATE So clearly was a problem with the ifixit battery. I replace with my old and everything work back ! I contact ifixit , and they already send me a New one. I am just a bit sad because i loose a lot of Time. But pretty happy of the reactivity of them ! Thanks all!
And i am really not sure its a Logic board problem. As i Saïd i Can Access to récupération tool of windows or Mac. Work good. Just when i try to enter in the system itself it shutdown. Sometimes i Can sée Quick my log page for Windows or Mac os, but Always shut it off just After..
I checked pin connector and they all seems good.. the problem its that I read all forum and didnt find anyone who has this problem. You totally sure it could not be a problem with the ifixit battery ?.. i would liké to put its back the older one.. but need to put the stick of again… And i confirm its not a retina 2015 but a mid-2015 retina , which apparently change a lot…
First to answer arbaman My Mac doesnt look at all as the two guides you sent me. And i dont have on it a usb c connector. Maybe because its a mid-2015 and not 2015… I will check the pins on the connector. And else bring to a professional..