Hello I found out my old beautifull WM-101 walkman and I came across to this forum because I need some help on restoring functionality. Enrico from Bergamo - Italy
Welcome! Most of these units need a new belt and that can be as easy as popping the back cover to as hard as having to unsolder some wires to move stuff. If the belt conditions are unknown, I'd order some from Fix My Audio on the front page before even opening it up. Other than that take a ton of photos for reference and if you need help. Good luck!