Vintage Synth Repair

Hi Colin,
You could try and connect it to another synth using MIDI IN-OUT and see if it plays ok.
If it does, problem could be a bad keyboard and then you’ll take it from there.
Old U-20s were known for the sticky-keys problem; are the keys free when played?
Hope that helps & keep us posted
Regards,
Noel

  
Hi, I have an old Roland U20 keyboard,when powered up,only the bottom and the top keys on the keyboard work,all in between do not produce a note.Everything else seems fine,any ideas?? Cheers Colin