How can I fix my Sony JA20ES Minidisc?

Hi Carol,
Not claiming to be the absolute expert, but it sounds like a IC logic problem to me. Either the player got stuck in a "command loop" for whatever reason, or the board/chip logic controller is defective. Maybe you should try to:
a) Leave the player on "as is" overnight
b) Press several commands (play/rewind, etc.) at once and keep holding for a few seconds.
c) Hold a few command buttons while plugging the player in

One of these actions may revert the logic control to it's normal operation.

Regards,
S.

Outfoxed
September 2009