Joe,
Most likely the control unit is not coming on because the control unit ON/OFF switch has died. Yamaha probably has the switch available, and I don't it would be that expensive. An option would be to have an electronics tech "eliminate" the switch and then connect your piano's power cord to a switched power strip.
They also should have floppy drives available, but the drive is NOT necessary if you are willing to play your piano from an external device like your computer or DKC-800, connected to your DKC100R via MIDI.
Bill
On Apr 26, 2015, at 11:25 AM, joe@... [disklavier] <disklavier@yahoogroups.com> wrote:
Thanks for the info about the XG being just a playback unit. I guess "died" is a pretty vague. We have two problems. The disk drive doesn't work (I think it was toddler grand kids inserting something). Now the controller won't turn on (possible a fuse or maybe the power supply, which I can have a tech run down for me). Anyway, my thought was if I can find a used controller, it probably wouldn't cost much more than a new disk drive and I'd have spare parts for future use.
Joe