Treasure chest claw machines

[Joe Malebranche]

I recently purchase 4 new treasure chest claw machines Have them set up and am having the same issue with each one.  Thjs is what the machines do... 

1.  Take $1  machine shows credit on the display. 

2. Gantry is in the home position to the left. Machines joystick or claw button don't do anything. 

3. Move the gantry manually away from home position then the machine starts to do its 15 second count down.  Joystick still will not move gantry nor will the claw button make the claw defend.  After the 15 seconds the claw descends as if the button was pushed