No Playback Suddenly On Dorico 5.1

I have reviewed this thread: Play mode -no sound in playback - #83 by wwzeitler
and used the video within. The video actually gave bad advice. It told me to delete the sound engine which was supposed to reload on a restart. It didn’t, and it took me half a day to just get dorico to work again at all.
In the video at one part it suggests opening up the viewer screen with the piano keyboard and trying that. I got no sound and no indication of anything lighting up at all.
I am on a tight deadline and I don’t have anymore time to spend on Dorico problems. Is there an easy way to fix this?

A few things to check:

  1. Do you have sound from any other application? If not, you need to figure out your sound setup
  2. If you have sound from other apps, check menu Edit → Device Setup and make sure the correct device, i.e., the one that your default media uses, is set
  3. Menu Play → Playback Template, choose any of the factory (Iconica/HSO etc) and click Appy&Close.

Thank you so much!!
It was number 2. on your list.
I am SOO thankful! I never would have guessed that.
Have a great day.