I can only get lines 1&2 to work, lines 3&4 produce no sound. Changed cables and players to make sure. Any thoughts?
Can you make a video of cables and input selector-knob?
Have you switched the channel input selector (above trims) to “digital” for the other channels?
I know it’s silly but sometimes we get excited and forget the little stuff…
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It’s not the input select, it’s the digital in posts at the back of the mixer. They have pulled out with my digital cable.
As you mentioned on your other separate post. - which post do you want to receive answers on?
Well we know now why they may not be working as they are out but originally that was not the case 
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