I need some help. I went out to fire up my blue/white Chinese laser last night and nothing. The internal light came on but nothing else. The controller never came up. The switch for the exhaust fan, which is on the same circuit as the laser power, works fine. So far I've checked the fuse, checked all the wiring for lose connections, checked the E-stop button and scratched my head. What am I missing? I really need this thing to be up and running soon. Thanks.