It’s possible with MIDI or an expression pedal to mute an H9.  So, to be on the safe side, please disconnect those…

Also could you double check that you’re going into input 1 and out output 1?  Plugging into input 2 without anything connected to input 1 will cause problems.

Thanks for the response.  Yes, I am using Input/outpt 1.

I have nothing else connected to the pedal (e.g. Midi/Expression,etc).  Is there a way I can check if it’s been muted via some MIDI code?  Also, wouldn’t the re-install/re-initialize have cleared this if it were the case?