Your battery was probably very low charged
If I were you, I would try those (be attentive to the led behavior when powering ON):
- Charging the battery for 30 min, then without connection to power supply, I’ll push the power ON button for 30 sec
If it does not work
- Remove the battery, connect phone to power supply, power it ON, see what happens
If it does not work
- Contact support@puri.sm (see How to properly send emails to Purism)