Troubleshooting No sound output; RF LED not glowing «Make sure the microphone and receiver power switches and receivers set to the ON position. Check microphone batteries to ensure that they are providing sufficient power. Replace battery If necessary. neckerchief receiver's AC power connection, Make sure antennas are firmly connected ard extended to. an optimal position: Hf necessary reduce the distance between the microphones and receiver, “Turn up the receivers VOLUME level controls.