via this auction

List of services done on the synth recently in addition to installing the midi mod:
*New Key Contacts
*New replaced CPU board (Synthtronics)
*New battery
*Voices Repaired
*New Power Supply Capacitors
*Calibration and tuning
*Misc cleaning such as scratchy pots
Presets have been modified from the factory presets as this was for recording sessions. Should be easy to reload the factory presets."