Ensure your NuraTrue Pro and case are charged. See Charging Your NuraTrue Pro and Case below.
Ensure the infrared (IR) sensor is clean and not obstructed. The IR sensor is located near the base of the ear tips, and there is a circular cutaway for the sensor on the wings. Try wiping the IR sensor with a tissue or cloth, and make sure the wing fixture isn't covering the sensor.
Reset your NuraTrue by performing a Device and Sleep Reset. If the issue persists, please try a Factory Reset, if possible. See Resetting Your NuraTrue Pro below.
If your NuraTrue isn't responding to our troubleshooting steps, please contact us here.