Ok nevermind. I finally got it to turn on. To do so, I had to turn on my laptop (obviously with battery power) hook up the USB cable, start PSUMoni, and then start the car. Finally it powers up. Seems strange though that I had to do that to get it to turn on.
Perhaps this needs to be addressed in the next firmware update. In any case, I'll post this to the Carnetix forum as well.