424 mkii won't play - but rewind and ff works fine


New Member
Aug 15, 2023
Gear owned
Portastudio 424 Mkii
Hello all!

As the title suggests, I recently purchased a 424 mkii, and the play button will flash for 3 seconds, and the tapes won't spin, then turn off. I'm not sure what the issue is, since the fast forward buttons and the rewind buttons work perfectly fine. Earlier I was playing a tape just fine, and now its having issues.

It seems like a choice on the part of the machine and not something thats broken. How do I fix this? I can't find anything online relating to this specific scenario.
Here's a video of the incident.
(For whatever reason this forum won't let me upload a video)
It's an unlisted YT vid so hopefully it works


Is there something wrong with the belt...? Let me know, thanks.

(Message for Mods: This is a re upload since I posted it on the wrong board, sorry)
Might be the capstan motor. Seem to remember having this problem with a 644 portastudio.
If you look through the posts you can probably find the thread.


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