Chosen Solution
My laptop (Macbook Air 13” Early 2015) died and the last time I saw it turned on, it was at 15%. I asked my cousin to charge it but when I got it back, it wouldn’t turn on. I know my charger is not the issue because every time I plug it in, it would turn green and then red (hence it was charging). We tried SMC reset and even tried to take the battery out but it’s still dead. I am 100% sure that it didn’t get wet or I didn’t drop it. Is it possible that the board is the problem or is it the battery?
Lets give this a try follow this guide MacBook Air 13" Early 2015 Battery Replacement to Step 3 with the battery now disconnected carefully put the system on its side so you can reach the power button and MagSafe port. With nothing connected press the power button for a good 15 secs. Now plug in the MagSafe charger your system should spontaneous startup - Did it?