Two MR816s - One not found

I have two Mr816csx. Starting last night the unit I have as Device 1 is not found by the MR816 driver panel and the clock lights on the front of the unit cycle clockwise as if the unit cannot establish clock. Has anyone else seen this symptom? Device 2 is recognized and does not exhibit the clock sync problem.
Any advise/help is welcomed.

Figured it out. I needed to do a Hardware Reset which it seems is accomplished by pushing in the Select 1 knob and holding the Channel 8 Pad Button while turning the unit on. Seems the unit’s brains got scrambled and needed sorting out.