what pin does the 12 volts go to on the power connector to the dmd?
remember the jumper W1?
you will have to make sure the jumper settings match up with the power input connector.
if you have the W1 jumper set to supply pin 4 then you will need your +12v on pin 4 if you have it set to supply pin 1 then you will need your +12v on pin 1
Please wait until this is verified before changing the jumpers


also make sure you are getting the +5 volts to the display driver board,