So it did it again this morning, booted up and bank -1 scene 6 button DOA.
Rebooted and it works again.
So I started troubleshooting a bit, rebooted three more times and all is well with the switch functioning.
On a whim I booted the FM9 while holding down the switch, and it acted exactly like what I've been experiencing, dead switch syndrome. I did this three times to hopefully confirm it was actually the case and it appears to be. So I can now recreate the symptoms on demand. I suspect what's happening is the crunchy sticky button winds up getting hung up in a "triggered/activated" state sometimes. Then when the unit is booted up, it deactivates that switch temporarily until it is in the position it expects it to be in, then restores that switch when it reboots. The first time it happened I don't recall if the button ever worked from that boot session or stopped after it had been running for a while.
Can anyone with more knowledge on how this thing works confirm my theory for me?
@FractalAudio @Admin M@