Hello, my name is Rusty. That sounds like the amplifier went off. If the meters are moving, that means there is input to the board. With the sound turned down to 25%, disconnect one of the output cables. You should hear a pop. BE SURE YOUR SOUND IS DOWN TO 25% when you do this. If you don't hear a pop, plug it back in, and investigate your amplifier. If you do hear a pop, let me know and we can continue troubleshooting.