Vortex Sound Research

Hi. Hope everyone is well. I got my Subharmonicon fixed recently because the Oscillator 1 volume knob wasn't functioning properly. It worked well for a couple of weeks after service but now the sequencer is not working. The trigger button is triggering the note but when I try to play a sequence, no audio signal comes out. The Sequencer is running though.

Has anyone experienced this problem and if so is there a solution or am I doing something wrong?

My Subharmonicon is under warranty and this is the second time I've experienced problems. Would you guys suggest that I get it serviced or ask the dealer to change the unit? Thanks.