Chosen Solution
It’s 13 inch early 2015. I found my MacBook dead suddenly . Later I opened it up but found that the battery is swollen and after that I tried to unplug the battery and turn on the Mac using AC POWER but it didn’t turn on?
First and foremost, you need to replace the battery. Be careful with this as the batteries on the 2015 pros are adhered in and are a pain to remove. I recommend liberal amounts of 99%ipa. Second. Make sure you have the proper voltage adapter. If you have an undervolted adapter it will not provide enough power. I also recommend using an OEM adapter.