Falcon 2 pro will not run out of the box

I bought a brand new falcon 2 pro engraver and built it no problem. But when I turned it on the air pump wouldn’t work leaving the red light on the laser head unit . After checking all connections,once or twice the air pump worked for a few seconds if I touched the wiring/ connector from the laser unit onto the block on the top rail. What am I missing?

So you have turned the adjustment knob for the air speed fully up? If you turn the Falcon 2 Pro off and on, does the air pump start?
It shuts off automatically after a few seconds, the GCODE or engraving software have to start it again if selected.