Bought a vivoactive 3 yesterday and HR monitor not working. There is no green lights on the sensor and HR measure just stays as a dashed line, not measuring anything.
i have tried everything I can think of. Turning the wrist HR off and then powering down, long power down (holding the button for a few seconds), connecting to a pc to check for updates, restoring factory settings.
any ideas or do I have a defective device?
many thanks