1. Increase the volume on the parent unit.
2. Check that the baby unit is plugged in.
3. Check that the parent unit is ON .
4. Check that the baby unit is ON.
5. The parent and baby unit may be out of range. Reduce the distance between the two. The signal strength may be monitored with the signal icon.
6. Lift the antenna on the parent unit for optimal reception. The signal strength may be monitors with the signal icon.