One night this week, while watching basketball, I decided to try and repair this Sony Walkman. Everything but the cassette deck worked properly which led me to believe it was a broken belt that needed replaced.
After watching a few YouTube videos (mostly to figure out how to open the deck), I was able to swap the old worn out belt with a new one. See photos below.
I know this seems silly, but I listed the Walkman for sale at $70 and it sold within 24 hours!
This was so much fun that I ordered another broken one off eBay and hope to repair it as well!