So my pack isn't working. Fuses look ok, but everytime I press the test button it just blinks like its recycling and never flashes. I have 2 batteries, one is turning on and the other is showing me an error sign when I turn it on. Also, does this pack work without the batteries? Could I run it from the Powercord, its not letting me do it now, but just checking if its supposed too. Any help would be awesome.