no sound from main outs

so, I just ot an MPC 1000 from Music Go Round, paid 315 bucks, had to replace a button and the casing, and I just fund out the main outs dont work. The ins work, but the outs not so much, and the assignable outs work too. Could it be a fried diode? or am I just not familiar with my settings?

Maybe the program is assigned to one of the assignable outputs?

That's the only setting that might be the reason why there's no sound comming out of the main outs.

But I guess u already checked that. There are no other settings that might mutes the main outs or reroutes the signal away from them.

Guess ur ****