Have you tried plugging the ribbon cable yet to the miniusb module?
I made a similar mistake. When powered on the demon defaults to the demons nand, which as you just installed, is empty. Which wont allow it to boot up.
Plug in the ribbon cable, plug in the psu for the 360, the bright blue led's should pop up on the module. Hit the toggle button to onboard so the LED's are off, then try to boot.
Sorry, saw the pics, ribbon is in.
Just confirm the LEDs are off and that it is loading the onboard.
Also is JRunner reading it from the mini usb? Can you get a dump from the onboard?