If you encounter problems working with the mixing board, please check the following features

Make sure the ST button is IN on each channel you are using. This will connect that channel to the STEREO slider on the far left which is the main.

Right above the slider is a clear button that says ON, Make sure this button in IN if you want to unmute the channel.  These do not light up so you must feel for it.


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​Above the last slider to the right labeled STEREO, make sure that channel is unmuted as well, depressing the ON button above it.
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The configuration on the left image is when the board is "Zeroed Out" 

Make sure you're using PHANTOM POWER if your microphones need it.  This can be easily overlooked