This happened to me.  I searched the Net in vain for answers.

I learned that those in the know know that the lack of green light means your H9 needs repair.   Few will respond to a question like this b/c they don’t want to be the bearer of bad news.

They don’t want to break this to you: stop wasting your time looking for answers.  Just send it to Eventide with $100 (a very good deal). Good luck.