Gregory,
you need to clarify before anyone gets in too deeply here
did you buy this as-is / for parts ?
were you aware this instrument, the original Roland series, is not a complete
device without the FBC-7 pedalboard.. you cannot access the full functionality
of the device without it, and the proprietary cable which connects them
while the unit CAN be used stand alone with a battery pack, it's functionality is
limited, as well as the Battery is charged with the FBC-7 either inside or out of
the FR7 for ongoing use
if you were not aware of any of this, then you may have recourse with the seller..
a bare bones FR7 is, for the most part, a doorstop, unless you are an
experienced electronics tech who can build your own Power system and
breakout box for the MIDI and pedal switching connections
if a bare bones FR7 is described as a functioning/working device then the
seller MUST at least provide a power source to prove that, otherwise
it is being mis-represented and is a false flag advertisement