Mysterious clicking sound in cockpit

[kngkwng]

There's this mysterious switch clicking sound every time I fly.  I need help figuring out what it is and how to fix it.  Things I've tried:

• Installed the latest version
• Restarted both my computer and flight sim
• Removed all toggle switch key bindings on my Bravo Throttle Quadrant
• Start the flight at both the gate/ramp in cold & dark, and start the flight at the start of a runway

The clicking sound doesn't go away no matter what stage of flight.