Facilities > Classrooms > Using the Microphone system Startup Power on: Wireless Microphone: Turn on both Audio and Transmitter switches on the Wireless Microphone. If Crestron Touch Pad Unit screen is dark, touch the Crestron screen to turn on unit screen. Touch portion of screen labeled, "Welcome to Columbia University." On the MAIN MENU, adjust SPEECH VOLUME using the UP/DOWN arrows and MUTE Buttons. Speak into microphone. Shutdown Power off: Crestron Touch Pad - Touch MAIN MENU button. Touch EXIT on the MAIN MENU. When prompted with "Are you sure you want to EXIT and turn OFF the AV System?", touch the portion of the screen that says, "Yes, System OFF." Turn off both Audio and Transmitter Switches on the Wireless Microphone. Troubleshooting No sound: Toggle MUTE button in ROOM CONTROL->SPEECH VOLUME menu on the Crestron Unit. Exchange battery in wireless microphone with a new rechargable battery in the battery charger located in the bottom shelf of the podium.