You say you can't scroll in the menu. Can you select an item if it is already highlighted? I thought I remembered someone having the same problem- I misremembered, but the code @Gordon gave for diagnostics in that case will still be useful I think: http://forum.espruino.com/comments/16366989/
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
You say you can't scroll in the menu. Can you select an item if it is already highlighted? I thought I remembered someone having the same problem- I misremembered, but the code @Gordon gave for diagnostics in that case will still be useful I think: http://forum.espruino.com/comments/16366989/