If you’re not receiving a signal, please check that your B-Head capsule is secured onto the Bottle bayonet.
Make sure that your Power Stream power supply has cycled fully from red to green.
If the light remains off a voltage change might be needed. Check the fuse for the right application using the voltage selector switch. AC 110V 500mA (for USA) AC 220V 250mA (for EU).
Try a different B-Head capsule
Please test another microphone on the same signal chain.
OR try your Blue Mic on a different input, interface, or mixer.
Restart your interface and application. Or try connecting your interface to a different USB port.