Powered mixer is not generating sound?

The speakers is alright, all wires, speakon, and crossover checked, but no sounds. I played some tracks from my PC, the mixer is playing it, the signa

The speakers is alright, all wires, speakon, and crossover checked, but no sounds. I played some tracks from my PC, the mixer is playing it, the signal is at around -2dB but no sound. I played it at half the volume. It is a 500watts powered mixer. I played it okay yesterday, but when I turned on today and played it, there's no sound. Help...

or:The speakers is alright, all wires, speakon, and crossover checked, but no sounds. I played some tracks from my PC, the mixer is playing it, the signal is at around -2dB but no sound. I played it at half the volume. It is a 500watts powered mixer. I played it okay yesterday, but when I turned on today and played it, there's no sound. Help...

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