MBP Early 2015 (A1502) has died!

macbook-pro boot hardware

this sounds like a Hardware Issue definitely. I have the same A1502 model. I have never seen any Mac do this but if you can connect the MacBook Pro to its charger then startup, you should press "D" while its starting. This will allow it to check itself for issues. If you are convinced that its a software issue, you can try booting up from macOS Recovery and reinstalling macOS. Good luck!

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