Dave Smith Instruments SYNTHESIZERS

When I fired the Evolver up the other day, I noticed that nothing happened
when I hit the Start/Stop button.  No sound; no LED's advancing through the
steps; nothing.  I had no problem with the sequencer prior to this and don't
recall changing any of the sequencer's settings.  I've checked about
everything I can think of (which may not be too much as I just bought the
Evolver from DSI about 2 weeks ago) including the Key Off/Xpose (set to OFF)
and Trigger Select (set to ALL) settings and can't come up with any reason
why the sequencer shouldn't be running.  Everything else seems to be
functioning normally.  I feel sure it's something I've unknowingly tweaked
rather than a problem with the synth, but I'm not figuring it out so far.
Any suggestions or similar experiences?  Regards.

Steve,
Cincinnati