Check the following:
├» Is the power switched on?
├» Is the LINE switch on the front panel switched out?
├» Are the INPUT and OUTPUT LEVELS set correctly?
├» For microphones that require phantom power (ie condenser microphones), is the +48V switch engaged?
├» Is something connected to the Instrument input? (This overrides the mic input.)
├» Are headphones connected? (These mute the monitor outputs - see the article regarding latency
├» Is there something connected to insert return?
├» Is the Optical Expander activated?
If the problem persists after checking these things then please contact us
for further support.