Disklavier

Hi, Group,
 
I just discovered that my Mark III original controller won't record. It 
makes a new file that doesn't play  except for the sustain pedal which moves 
while the piano plays  nothing.
 
(Of course this had to happen when my granddaughter wanted to  critique 
herself as she practices for an important recital.)
 
Previously recorded floppies, CDs and on board digital disks play  as 
expected.
 
I was about to do a factory reset, but, decided to query this  amazing 
group if they have any suggestions before I do anything  else.
 
Thanks in advance,
 
Glen Perry