I have a new Maxxfann 7500 and I am trying to test it before installing it. I hooked to to an AC to DC converter that is outputting 12 volts and 9 amps. I open the lid before applying the power. After I apply the power the fan beeps and the lid closes but after it closes I can't get it to do anything, it won't open back up and the fan doesn't start. Is there something I'm missing or do I have a bad fan. I will call the company tomorrow when they are open unless someone on here can tell me I'm doing something stupid and we get it working. Thanks.