Rhodes Chroma Polaris

I had the pleasure of meeting Bill Thomas whom was the factory service manger for Arp,Fender and Roland.
 He sold me his Chroma Polaris and it worked wonderfully for years.  I had to pack it up and move.  When I unpacked it recently it did not sound.
I have the original tapes and manual that came with it.(also the box,does any one want the box and Styrofoam? Free - just pay shipping)

The front panel appears to work fine.
I was wondering what suggestions any one has for rebooting the instrument.  I will probably replace the battery at the same time.Thanks in advance
Best regards
Thomas Rizzi
rizzitech@...