Hi!
If there are no lights on, the board is in NKRO mode and the machine in Plover should be set to Keyboard.
But you probably want to use the EcoSteno in Gemini PR mode instead. You can change the mode by pressing the button on the top left until the green light turns on. Then in Plover you then need to go to Configure > Machine, set the machine to Gemini PR and then scan for the machine. If the scan doesn't work, you might need to manually choose the machine in the port dropdown list.
There's a bit more information on the
EcoSteno product page, including a
video on how to set it up (although it was made with an older version, so make sure to use Gemini PR instead of TX Bolt) and a
diagram showing the different available layouts that the board has.
I hope that this helps :)
-- Ant