The Pirate is right unfortunately. I work on all sorts of electronics and have experience with that unit. If there is anyway to not open the controller, don''t. The boards are connected together U.K. style and very prone to failure. The dodge switch will fall out, the O-ring will need to be replaced, they are tough to get back together correctly and you will most probably end up with an intermittent new problem. I wasted 6 hours on one of those things with a similar problem. If you must crack it open and need help, drop me a note.