Audio 8/Mixer Problem

Please help!

4 Deck Set Up:-
Audio 8
Pioneer DJM 800
2 X 1's

When I play the track in Deck A, it comes through into Channel 2 on the mixer
When I play the track in Deck B, it comes through into Channel 3 on the mixer
When I play the track in Deck C, it comes through into Channel 4 on the mixer
When I play the track in Deck D, it does not play anywhere!!!

This happened very suddenly with not explanation or reason why. One minute it was working fine, packed up went to the club and the above happened.

I have tried everything, looked at all the routing, I have spent hours trying to fix but cannot find the problem.

PLEASE HELP!!!!!

 

Have you tested all the physical outputs of the Audio 8?

 

I am pretty sure I have, having spent hours trying everything I can think of.

What procedure would you use to test the outputs?

Appreciate the response!

 

I mean are you able to get sound from all of the outputs? Does your 4 deck setup work ok at home?

 

It was working perfectly at home as I prepped a set for the club - A into 1, B into 2, C into 3 and D into 4.

Got to the club, guy before me was using a S2 or S4.

I plugged in and this problem started, which I cannot fix.

The problem remains even when back at home using the same set up as I have for years - hence the confusion as to what could possibly be wrong

 

So have you have tested each output individually after the problem occured?