You'll need your computer to power on your phone.
https://www.howtogeek.com/how-to-turn-on-an-android-phone-without-the-power-button/?utm_source=dlvr.it&utm_medium=blogger
https://www.howtogeek.com/how-to-turn-on-an-android-phone-without-the-power-button/?utm_source=dlvr.it&utm_medium=blogger