via this auction

Services Performed:
Disassemble keyboard completely
Clean and replace all grommets under keys
Repair several J wires
De-oxidize all key contacts
Re-level keyboard
Remove and replace all power related tantalum capacitors
Resolder all stake type connectors and de-oxidize all inter board connectors
Repair MUX control system in front panel
Clean all potentiometers
Re-mount transformer
Replace power cord
Replace lithium battery for memory
Check basic operation of MIDI (early 90's Kenton type midi, transmits on ch#1).
Re-oil and clean case, repair several stripped screws
Repair several previous internal repairs that should have been done better
Check operation"