When you power cycle your modular system make sure that the USB A-A cable is not connected.

Sequence of events should be:

  1. Disconnect all USB cables
  2. Power off modular
  3. Count to 10
  4. Hold button down, and power up
  5. Connect USB A-A cable

Also, and this is on Linux but may also apply elsewhere, I’ve had unreliable results when using USB 3.0 ports on my computer. Try using USB 2.0 ports.

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