Chosen Solution
I have a MacBook early 2015 Retina display. It was on 100% and had been plugged in and was charging, it reached 100% and I kept it in charging for a little bit. I was in the middle of a video conference when it suddenly turned off and now will not turn back on. There is no water damage. I can reset the smc or reset any thing else because the Mac just won’t turn on. I tried unplugging and replugging the battery. Still no dice. I had replaced the battery maybe 3/4 months ago. And it worked fine afterwards, up until this point. So far I’ve tried: 1 - pressing and holding the power button for 10+ seconds. 2 - unplugging battery, waiting about a minute, and then replugging it. I don’t know what else I could do? The power cable, when I plug it in shows green. The battery has charge, but the computer just won’t turn on. No sounds, nothing turning on at all.
I would recommend removing the bottom plate, disconnecting the battery, and then connecting the charger with the battery still disconnected and the bottom plate removed (you may need to set the computer on its side). Now press the power button. Do the fans move at all? If you don’t get signs of life at this point you probably have an issue with your logic board or the MagSafe 2 board. You can use a multimeter to read the voltage being passed by the MagSafe 2 board to see if it’s normal. If it’s abnormal you may need to replace your MagSafe 2 board. If that ends up being the case, follow this guide. Hope this helps!
