I recently got an old JVC KD D4 and as I was rewinding a tape something got stuck and now none of the buttons work including eject. I included a video to
VINTAGE RARE JVC KD-D4 KD-D4J CASSETTE DECK Super ANRS Works Great cable + Tapes $44.44 - PicClick
JVC KD-D4 Cassette Deck Photo #1793036 - UK Audio Mart