Ok I see. Well it was bought yesterday and have been the same from the start so it must be some manufacturing error then. I have tried many different headphones without much difference.
Try pushing in the headphone plug some more, even if you think it’s already all the way in. These players have a notoriously tight jack when new, and not having the plug all the way in can cause the problem you describe.
Ah, that’s right! Been so long since anybody mentioned this, I’d forgotten about it.
Great suggestion George!