Rockford Fosgate T600-4

Does anyone know if all the audio driverboards and outputs have to be in this amp in order for it to have output?

I’m working on 2 channel at a time and can’t get any output from any channel .

I know the amp won’t have output on the channels the outputs are missing from but the other 2 channels also have no output
 
I will check to see if the audio is reaching all of the driverboards .

The amp is using these audio driverboards

Fosgate will not release the schematic for this amp
 

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