You haven't done something daft, like pressed the pause button, have you?
If there's muck in the workings you can sometimes clean it out without having to open it all up, just do it through the door. Tweezers, cocktail sticks, cotton buds and some nail varnish remover would be all you'd need.
That which can be asserted without evidence, can be dismissed without evidence. - Christopher Hitchens
Cantankerous and Grumpy