Mikidymac is correct. If you can get someone or the dealer to read your ski on their candoo or buds they can tell you what code it is throwing. Then take that code and look in the manual. The manual will tell you what the code means, or just post the code here and I or someone else can interpret it for you.
Just for curiosity start the ski and rev it between 4000 and 5000 rpm with a volt meter on the battery. It should read between 13.5 and 14.5vdc. Anything under or over those numbers will tell you that the rectifier has gone bad.
DI skis are known to have rectifier problems around the 10 to 12 year mark.