OK So I loaded firmware onto my ramps board and that seemed OK. I then mounted the circuit board to my i3v and attached all the wiring.
When I flip the power on my power supply, nothing happens.

I double checked that my power supply is providing about 12.4V to both the 5amp and 11amp connectors.

I know that the 12V is getting to the board, but I don't know what to do now... No lights no display.

Any help would be greatly appreciated.