I connected my Shaw direct box directly to 12 volt, the box adapter says 12 volts @ 2amps, this should work OK except when I tried it the box would not accept the signal. It was frustrating trying to make this work because the dish was 100' away through a very thick bush of rose bush and although my Satellite finder was screaming the box indicated no signal after several attempts I gave up. When I went home and connected the box to a connection I know works the box said the same thing no signal. Could hooking the box directly to the battery cause this? Or is it another bad box this has happened in the past.