Lenovo Legion Won't Start or Work without being plugged in

I have a lenovo legion y530-15ICH. For the past few days my computer has not been working if it hasn't been plugged in. It will not turn on if it isnt being charged, and if it is turned on and gets unplugged it will immediately shut off - it doesn't even enter a shut down se uence, it just hard kills itself. Recently I was also playing a video game (Hearts of Iron IV) and part way through the video game the computer hard killed itself as well, though I don't know if that changes anything.