Problem: Volume knob does not work. I was on tour for a month and had to buy a line mixer to control the volume. We had to tell the sound guy to crank the volume on his sound board to get any audio from our sp404. What can I do?

Our rca outputs don't work and the lights on bank A and B are dead!

Any suggestions before I bring it somewhere?

Ive seen the same thing on 2 SP404s b4. just take it to the shop. It will probably be expensive...but cheaper than buying a new one.

bummer. Electronic shops in Chicago are such a rip off!