Seeburg USC1 Digital Receiver & Decoder question

Hi all,
I posted a while ago about my juke going crazy and not selecting anything.
I contacted the seller, and he is sending me another gray box working, the
digital reciever & decoder. I have no idea what I did to kill the first
one, if I did anything. Right now, the juke is stuck in a loop of playing
each and every 'a' side and 'b' side since i did the d cell battery test.
When I plug in the new box, or before that, should I be doing something to
get the juke out of this loop to avoid frying the new box, like trying to
get the juke out of this loop, or is this even an issue? I was concerned,
because I read at a site somewhere that every selection is energized now,
since the juke is currently brain dead and cannot select anything
specific,so I didn't want to fry the new box when I install it.

Thanks,
Josh
http://www.joshkaplan.com, home of Pinball Central