I had the same problem this summer. After the trouble shooting manual -my 2001 MDC was bad as well. The good news is you can buy most models direct from Medallion and save 60% !
You will need the #s off the sticker on the MDC.
It was around $250 after shipping.
Medallion Customer Service
PM me if needed - i can give you the contacts name and email - i just hate to put it on the web without permission.