I think it's called a Mondo rather than Mendo.
I find repairs to cable winders difficult to achieve - if your cable shows signs of being intermittent then first try cuttlng away about 6" of cable and fit a new plug - this often fixes cable faults.
If the cable is visibly damaged along its length then consider fitting a cable joiner - Amazon sell them Flex Connector £3.48
If you need to access the winder then you will need to separate the two halves of the case.
Good Luck..., September 2016
