Pulse Cinema soundbar suddenly failed

We had a Pulse Cinema soundbar connected to our network and to a TV via HMDI ARC.  It was working perfectly for two days on 120V. (And sounded quite good.)  It suddenly failed while playing.  No lights, no wifi signal. Unplugging, waiting 30 seconds (and more) has no effect.  Not responsive.  

It's behaving as if a fuse blew.  Will not power up.  Is there anything short of returning this unit that I could try?