We keep our 340 at Keowee Marina, have been there for 7 years, I would be more than happy to share all the information that I can. I also sent a PM with contact info if you would like to talk.
Gary
I had the same problem, turns out the "joy stick" was pressed in and when pressed in would not allow for full motion of the light. Pull the "joy stick" up or out , you will feel it click, see if that will work