I took my 2015 Mastercraft Prostar out on open water today to pull friends free skiing and air chairing. After a while the ZO screen started going off and on at will. The timer window also started popping up on the screen. The screen was very warm to the touch and trying to switch speeds or switch to trick mode also didn't work. I finally outsmarted the unit by increasing the slalom speed up to 36 so I could continue pulling kids at speeds lower than 36 so it wouldn't engage. The On/Off button kept going off and on. Later in evening I went back down to dock and started the boat and it seemed to be OK. Boat has 160 hours on it. Any ideas out there....HELP!?