Person Sensor V1.1 not working?

I connected the sensor to 3.3V and GND as per developer guide first steps and I got some green flashes from the board when trying it in different orientations.

The next time, however, I got nothing at all.

The sensor board is completely dark no matter it’s orientation.

I’m using a 18650 cell and a MIC37100-3.3 as a power source which is more than enough.

What should I do?

Can you share a photo of the wiring/soldering?

Do you have a non-battery power source you can try? Does it appear on i2c scan if hooked up to something else?