I just got my unit back from pioneer . I had messed the main board on the unit. They replaced the main board and the flex cable.

 

I installed the unit and none of my preamps work. I have a stock stereo and that works just fine but my subs don't work. I have everything hooked up right and the subs power on. I hooked up my mp3 player to the rca on the sub and they work. I have the sub turned on in the settings.

 

Is there some connection that they could have left unpluged internal that i can plug in or should I send it back to them?

Well, I took my unit apart and I found the cable from the main board to the small board for the pre amps was missing.

 

Back to pioneer to fix it.