John, did it ever work right? Because if its brand new its a question for the people you purchased from. Chinese lasers are more or less about the same. They purchase the components and build a machine and someone wires it up and out the door. If it works when you receive it then they did a good job, if not you really need to have some troubleshooting and use of a VOM skills. All I can say first is check for loose connections, everything and with a screwdriver to tighten the screws. My first one was a big learning curve, wires in terminals.... screws never tightened. Kind of worked some times.
There is No magic wand when working on these, it takes time and research. Google is your friend.