Built my PiCade tonight off a Raspberry 3 and 12.1 Display (HDMI VGA 2AV LCD driver board 12.1" LTD121ECNN 1024x768 lcd panel). The display does receive power, but it is still black. When I press the button on the bottom of the display keypad, there is a quick flash on the screen from gray back to black, so something is going on. The display keypad also constantly shows a red light rather than green and in my limited tech support background…I know that’s not good. The flat ribbon cable from the board to the display is seated firm, but I know those can be finicky.
I’ve attached pictures for reference. Any advice or assistance is appreciated.