solenoid

I decided to get my CO2 system back up and running after moving a while back and come to find the solenoid completely snapped off the regulator. When I open the valve, you can hear and feel CO2 hissing out of it, so much so that none of it gets to the bubble counter. I've tried to fill where it...

Does anyone know if the JBL m603 requires an external solenoid or if it is built into the computer?